* fix configure meson for non windows builds.

* change to the two ports using meson

* fix passing of empty compiler arguments.

* dont transform / into - for all flags

* copy meson logs into the buildtree to better diagnose CI errors of meson ports

* another change to the two ports to actually force a CI rebuild

* add missing /pkgconfig dir to PKG_CONFIG_PATH

* fix pkgconfig setup

* add share/pkgconfig to PKG_CONFIG_PATH

* Add CMake path to PATH for meson

* add share folder to prefix for meson

* remove double message

* add libdir so that meson does not install into architecture folder in linux
and make prefix path target dependent. (Or should it be host dependent?)

* bump controls

* update toolchain selector to use VCPKG_TARGET_IS_<paltform>.

* change pkgconfig prefix and path.....
meson is not correctly handling native windows paths and eating "\"
PKG_CONFIG_PATH also nees : to correctly separate paths
Prefix still must be near to native path but with / instead of \ C:/somepath/

* mesonbuild - Update to 0.52.0

* [tool-meson] Add package to represent dependency on Meson build-system

* [libepoxy/]Add support with unix.

* [libepoxy]Improve warning message.

* [vcpkg] Add "Homepage" field to the CONTROL files.

* [various ports] remove references to CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS

* [alac,benchmark,capnproto] Fix  check_linkage call

* [fastlz] Fix SHA512

* [coroutine] Fix dynamic build

* [folly] Find double-conversion

* [gamma] Use vcpkg_from_github

* [librsync] Enable static builds

* [netcdf-cxx4] Fix SHA512

* [octomap] Fix static build

* [tidy-html5] Fix static build

* [various ports] remove custom messages for shared/static builds, modernize some scripts in the meantime

* [folly] Use ras0219's fix for link paths

* [octomap] Fix exported targets

* [uvatlas] Set tool download SHA512

* [duktape+python2] fix portfile to call configure with correct python version, manage python2 also outside win32

* [suitesparse] osx fix

* [gtkmm] Call vcpkg_check_linkage after including vcpkg functions

* [duktape] Resolve conflicts

* [duktape] FIxed typo in Python paths

* [wangle] Find zlib

* [openssl-uwp] Fix SHA512

* [glib] Allow static builds on non-Windows

* [suitesparse] Fix build on Windows

* [multiple ports] Bump CONTROL version

* [multiple ports] Fix description indent

* [directxtk] Fix CONTROL file

* [bde,duktape,qpid-proton] Build packages with python2 installed

* [binn] remove CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS

* [gdal,live555,uriparser] Fix regressions

* [live555] Update to 2019.04.24