[DWARF] Don't include TestingSupport in LLVM_LINK_COMPONENTS.

This fixes a cmake configuration issue when LLVM is configured with no targets.
Instead we need to add TestingSupport directly with target_link_libraries.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@306842 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed