Recommended update for llvm7
This update for llvm7 fixes the following issues:
- Enable RTTI (run time type information) by built for LLVM. (bsc#1139584)
This update was imported from the SUSE:SLE-15-SP1:Update update project.
- Submitted by Michael Gorse (mgorse)
Fixed bugs
bnc#1139584
LLVM8: inconsistent configuration exposed between cmake and llvm-config