[GN] Updated build file to allow GN builds to succeed at ToT.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@354683 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/gn/secondary/clang/lib/StaticAnalyzer/Checkers/BUILD.gn b/utils/gn/secondary/clang/lib/StaticAnalyzer/Checkers/BUILD.gn
index 785ff82..910d747 100644
--- a/utils/gn/secondary/clang/lib/StaticAnalyzer/Checkers/BUILD.gn
+++ b/utils/gn/secondary/clang/lib/StaticAnalyzer/Checkers/BUILD.gn
@@ -54,6 +54,7 @@
     "IvarInvalidationChecker.cpp",
     "LLVMConventionsChecker.cpp",
     "LocalizationChecker.cpp",
+    "MIGChecker.cpp",
     "MPI-Checker/MPIBugReporter.cpp",
     "MPI-Checker/MPIChecker.cpp",
     "MPI-Checker/MPIFunctionClassifier.cpp",