Log Message:
Changes 1.4.2:
Add C++ guards around generated headers
Add z,relro and z,now to the GCC linker flags
Add explicit version flags for macOS builds
Add missing visibility compiler flags
Prefer using pkg-config files to find GLES
Fix build on MSVC 2013 when using the inline keyword
Fix dlwrap on aarch64
Require Meson ≥ 0.38.1
Allow building Epoxy as a Meson sub-project
Avoid crashes when running Epoxy on X servers without GLX