Also run extra tools unit tests in shared library builds.

Took me way too long to figure out why they didn't run.

git-svn-id: https://llvm.org/svn/llvm-project/clang-tools-extra/trunk@215543 91177308-0d34-0410-b5e6-96231b3b80d8
Try to unbreak the Makefile build.

git-svn-id: https://llvm.org/svn/llvm-project/clang-tools-extra/trunk@215545 91177308-0d34-0410-b5e6-96231b3b80d8