unittests/CMakeLists.txt: Add missing VMCore/ValueMapTest.cpp to VMCoreTests.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119040 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/unittests/CMakeLists.txt b/unittests/CMakeLists.txt
index 9b9c57e..36aace5 100644
--- a/unittests/CMakeLists.txt
+++ b/unittests/CMakeLists.txt
@@ -80,6 +80,7 @@
   VMCore/InstructionsTest.cpp
   VMCore/MetadataTest.cpp
   VMCore/PassManagerTest.cpp
+  VMCore/ValueMapTest.cpp
   VMCore/VerifierTest.cpp
   )