Fix the static build.

llvm-svn: 295245
diff --git a/clang/tools/c-index-test/CMakeLists.txt b/clang/tools/c-index-test/CMakeLists.txt
index 7244e2c..ad990e0 100644
--- a/clang/tools/c-index-test/CMakeLists.txt
+++ b/clang/tools/c-index-test/CMakeLists.txt
@@ -17,6 +17,7 @@
 if (LLVM_BUILD_STATIC)
   target_link_libraries(c-index-test
     libclang_static
+    clangCodeGen
     clangIndex
   )
 else()