[CMake] Pass monorepo build settings in cross compile

This allows the cross compiled build targets to configure the LLVM tools and sub-projects that are part of the main build.

This is needed for generating native non llvm *-tablegen tools when cross compiling clang in the monorepo build environment.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@358779 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed