Move the setting of LLVM_BUILD_MODE to a macro so that we can re-use it in compiler-rt

Differential Revision: https://reviews.llvm.org/D38470

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@318034 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed