loonycyborg ffb078c119 scons: don't let pkg-config to add prefix on msys2
This is workaround for windows style path confusing scons if they appear
in CPPATH etc. Paths without prefix still happen to be valid and they
start with "/", not "c:".

(cherry-picked from commit b347bc70b163a572751b7ac72f23e472c3ac9238)
2018-10-07 03:22:09 +00:00
..