meson: add windows compiler checks and libraries

v4: - Fix typo in warning code (4246 -> 4267)
    - Copy comments from scons for what MSVC warnings codes do
    - Merge linker argument changes into this commit
v5: - Add /GR- on windows if LLVM is build without rtti (equivalent to
      GCc's -fno-rtti')
    - Add /wd4291, which is catching the same hting that
    -Wno-non-virtual-dtor is on GCC/Clang

Acked-by: Kristian H. Kristensen <hoegsberg@google.com>
1 file changed