gn build: Merge r372267

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@372268 91177308-0d34-0410-b5e6-96231b3b80d8

utils/gn/secondary/llvm/unittests/Bitcode/BUILD.gn

@@ -10,5 +10,6 @@ unittest("BitcodeTests") {
   ]
   sources = [
     "BitReaderTest.cpp",
+    "DataLayoutUpgradeTest.cpp",
   ]
 }