Update CMake dependencies.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@146836 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Basic/CMakeLists.txt b/lib/Basic/CMakeLists.txt
index fe16ee9..ef2e93c 100644
--- a/lib/Basic/CMakeLists.txt
+++ b/lib/Basic/CMakeLists.txt
@@ -43,5 +43,6 @@
                  ClangDiagnosticLex
                  ClangDiagnosticParse
                  ClangDiagnosticSema
+                 ClangDiagnosticSerialization
                  ClangDiagnosticIndexName)