Add gTest unittests to clang, and write the first one.
This is the Makefile version only; the cmake implementation is coming soon.

llvm-svn: 124777
diff --git a/clang/unittests/Frontend/Makefile b/clang/unittests/Frontend/Makefile
new file mode 100644
index 0000000..1ac0dd64
--- /dev/null
+++ b/clang/unittests/Frontend/Makefile
@@ -0,0 +1,19 @@
+##===- unittests/ADT/Makefile ------------------------------*- Makefile -*-===##
+#
+#                     The LLVM Compiler Infrastructure
+#
+# This file is distributed under the University of Illinois Open Source
+# License. See LICENSE.TXT for details.
+#
+##===----------------------------------------------------------------------===##
+
+CLANG_LEVEL = ../..
+TESTNAME = Frontend
+LINK_COMPONENTS := core support mc
+USEDLIBS = clangFrontendTool.a clangFrontend.a clangDriver.a \
+           clangSerialization.a clangCodeGen.a clangParse.a clangSema.a \
+           clangStaticAnalyzerCheckers.a clangStaticAnalyzerCore.a \
+           clangAnalysis.a clangIndex.a clangRewrite.a \
+           clangAST.a clangLex.a clangBasic.a
+
+include $(CLANG_LEVEL)/unittests/Makefile