Add a little banner to this test. This lets my scripts more easily
automate the process of updating and generating these tests.

If anyone is really interested, I can check my scripts for generating
this test in, but its a horrible pile of shell... Not sure its really
worth it.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@140691 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Preprocessor/predefined-arch-macros.c b/test/Preprocessor/predefined-arch-macros.c
index 2e77682..0b65169 100644
--- a/test/Preprocessor/predefined-arch-macros.c
+++ b/test/Preprocessor/predefined-arch-macros.c
@@ -1,6 +1,8 @@
 // These tests are generated by running utils/generate_arch_predefine_tests.sh
 // to observe GCC's behavior (or some other system compiler's behavior).
 //
+// Begin X86/GCC/Linux tests ----------------
+//
 // RUN: %clang -march=i386 -m32 -E -dM %s -o - 2>&1 \
 // RUN:   | FileCheck %s -check-prefix=CHECK_I386_M32
 // CHECK_I386_M32: #define __i386 1
@@ -616,3 +618,5 @@
 // CHECK_ATHLON_FX_M64: #define __tune_k8__ 1
 // CHECK_ATHLON_FX_M64: #define __x86_64 1
 // CHECK_ATHLON_FX_M64: #define __x86_64__ 1
+//
+// End X86/GCC/Linux tests ------------------