Print an error for uses of __thread on targets which don't support it.

llvm-svn: 69553
diff --git a/clang/test/CodeGen/thread-specifier.c b/clang/test/CodeGen/thread-specifier.c
index 08992a6..456f7a6 100644
--- a/clang/test/CodeGen/thread-specifier.c
+++ b/clang/test/CodeGen/thread-specifier.c
@@ -1,4 +1,4 @@
-// RUN: clang-cc -emit-llvm -o - %s | grep thread_local | count 4
+// RUN: clang-cc -triple i686-pc-linux-gnu -emit-llvm -o - %s | grep thread_local | count 4
 
 __thread int a;
 extern __thread int b;