llvm-rc: Forward DEFINES instead of FLAGS
Since !4219 (merged) we pass the full target <FLAGS>
to the llvm-rc resource compiler, but we should pass only <DEFINES>
.
If possible this correction should land in the next 3.17 release candidate.
Fixes: #20414 (closed)
Backport: release
Topic-rename: llvm-rc-defines-not-flags
Edited by Brad King