* [llvm] update to 12.0.0, enable zlib and libxml2

* [llvm] disable libxml2 by default, arm64-windows should be supported

* [llvm] try to fix build with ffi on Windows #17663

* [llvm] re-enable libxml2

* [llvm] fix formatting

* [llvm] overwrite version

* [mesa] update to v21.1.0

* [llvm] update ci.baseline

* [halide] update to the latest master commit

* [llvm] disable libxml2 port until complete PR #15390

* update versions

* [llvm] fix disabling of external libraries

* update version

* update ci.baseline

* update ci.baseline

* fix typo

* [llvm] fix libxml2 (depends on #17945)

* revert "[halide] update to the latest master commit"

* update versions

* [halide] fix zlib dependency for tools

* update versions

* [halide] update to official release v12.0.0

* update versions

* [halide] update to v12.0.1

* update version

* [mesa] remove llvm from defaults

* update version

* update ci.baseline

* [mesa] update to v21.1.2 and fix build with LLVM on Windows

* [llvm] allow to build libunwind project on Windows

* update versions

* [mesa] update ci.baseline.txt to disable x64-windows-static-md, may be fixed in the PR #18495

* fix issue #16215

* add more projects and fix issue #16222

* add version

* exclude libc from default projects

* remove libc, add fland to default projects

* update to v11.1.0

* fix compiler-rt install path

* fix SHA for version 11.1.0

* fix libc++ install

* re-fix libc++ install

* fix pstl install

* fix flang's license file name

* install tools in tools/llvm, fix file names

* revert bin directory for libraries

* don't create clang sub-directory in llvm/tools

* overwrite version

* copy tool dependencies

* overwrite version

* remove vcpkg_copy_tools call

* overwrite version

* restore default features

* overwrite version

* overwrite version

* convert manifest to json

* install usage files

* overwrite version

* remove feature `default-projects`

* modernize CMake in usage files

* overwrite version

* update ordering

* override version

* [llvm] Fix resource path when building tools

* update version record

* [vcpkg] allow to use semicolons in COMMAND argument

* [llvm] update to 11.0.0

* [vcpkg] use latest version

* [vcpkg] allow to use semicolons in OPTIONS

* fix vcpkg_fixup_cmake_targets

* [llvm] fix more install paths, add /bigobj option, fix up CMake targets

* Apply suggestions from code review

* [llvm] fix clang, flang, lld, mlir and polly CMake targets

* [llvm] remove empty include directory /include/flang/Config

* [llvm] Flang requires C++17

* [llvm] add /Zc:__cplusplus

* [llvm] remove empty include directory include/clang-tidy/plugin

* [llvm] try to fix ClangConfig.cmake, LLVMConfig.cmake, LLDConfig.cmake etc. with patch

* [llvm] set tools install dir to tools/llvm

* [aws-sdk-cpp] fix build after changes in vcpkg_configure_cmake.cmake

* [llvm] disable Flang and OpenMP on Windows

Co-authored-by: Nicole Mazzuca <mazzucan@outlook.com>

* [llvm] install tools in tools/llvm

* remove the giant commented out block of code

* update port-version

* hopefully fix the port?

There are still some issues, namely that the python scripts and DLLs that are copied into `tools/llvm`
are not considered to be "installed by llvm", and thus are not removed when llvm is removed

* format!

* apparently REGEX REPLACE fails if a thing doesn't match

* fix LLVM_REMOVE_EXTENSION_REGEX on windows

* actually read the cmake regex docs...

* fix the name of the variable

* turns out CMAKE_MATCH_1 is the one I want

* need to update VERSION for new policy

* stop removing debug/bin

* fix faulty merge

* fix LLVM target-all feature

* [halide] bump Halide to version 10.0.0

* Use empty package policy to allow plugins to be located in lib.

This is following the recommendations in a conversation I had
with Robert Schumacher on the #vcpkg CppLang Slack channel.
This recommendation was derived from the fact that "cmake
defaults module DLLs into the lib folder, which makes vcpkg's
current policy very inconvenient for authors" and that I do not
plan to enable build systems other than CMake.

* [halide] skip x86-windows due to MSVC bug

* [halide] restore x64-windows-static fail status

* add usage file to Halide

* Update CONTROL version

* Remove '!emscripten` from ports/halide/CONTROL

Co-authored-by: NancyLi1013 <46708020+NancyLi1013@users.noreply.github.com>

Co-authored-by: Lily <47812810+LilyWangL@users.noreply.github.com>
Co-authored-by: NancyLi1013 <46708020+NancyLi1013@users.noreply.github.com>

Co-authored-by: Nicole Mazzuca <mazzucan@outlook.com>