Implement -fgnu89-inline. Fixes PR10041.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@132460 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/extern-inline.c b/test/CodeGen/extern-inline.c
index 60f6d03..e3df996 100644
--- a/test/CodeGen/extern-inline.c
+++ b/test/CodeGen/extern-inline.c
@@ -1,4 +1,5 @@
 // RUN: %clang -S -emit-llvm -std=gnu89 -o - %s | FileCheck %s
+// RUN: %clang -S -emit-llvm -fgnu89-inline -o - %s | FileCheck %s
 // PR5253
 
 // If an extern inline function is redefined, functions should call the