Reviewed-by: Jose Fonseca <jfonseca@vmware.com>
This patch is based on 28e3f85e09/mingw-w64-mesa/link-ole32.patch but with tweaks to avoid MSVC build break when applied.
v2: Create Mingw platform alias pointing to windows host platform define to avoid spurious crosscompilation;
v3: Fix obviously wrong compiler flags for swr driver;
v4: Update original patch URL because it has been relocated;
v5: Don't bother patching autools stuff as it's not used by MSYS2 Mingw-w64 build and it's days are numbered anyway;
v6: After Mingw posix flag fix in 295851eb things are far simpler as we don't need more linking of uuid, ole32, version and shell32 than what is already in place.
ffb0d3a25c