[gn] Add clang-tools-extra/clang-tidy/tool/BUILD.gn

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@356827 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/gn/secondary/clang-tools-extra/clang-tidy/tool/BUILD.gn b/utils/gn/secondary/clang-tools-extra/clang-tidy/tool/BUILD.gn
index c8b378d..a5f7af4 100644
--- a/utils/gn/secondary/clang-tools-extra/clang-tidy/tool/BUILD.gn
+++ b/utils/gn/secondary/clang-tools-extra/clang-tidy/tool/BUILD.gn
@@ -17,6 +17,7 @@
     "//clang-tools-extra/clang-tidy/misc",
     "//clang-tools-extra/clang-tidy/modernize",
     "//clang-tools-extra/clang-tidy/objc",
+    "//clang-tools-extra/clang-tidy/openmp",
     "//clang-tools-extra/clang-tidy/performance",
     "//clang-tools-extra/clang-tidy/portability",
     "//clang-tools-extra/clang-tidy/readability",