Add some missing CMake dependencies

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@73700 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Driver/CMakeLists.txt b/lib/Driver/CMakeLists.txt
index 7147d8f..42cbff9 100644
--- a/lib/Driver/CMakeLists.txt
+++ b/lib/Driver/CMakeLists.txt
@@ -17,3 +17,5 @@
   Tools.cpp
   Types.cpp
   )
+
+add_dependencies(clangSema ClangDiagnosticDriver)