Add a test case for r81431.

llvm-svn: 81432
diff --git a/llvm/test/FrontendC/redef-ext-inline.c b/llvm/test/FrontendC/redef-ext-inline.c
new file mode 100644
index 0000000..240beb1
--- /dev/null
+++ b/llvm/test/FrontendC/redef-ext-inline.c
@@ -0,0 +1,6 @@
+// RUN: %llvmgcc -S %s -o -
+// rdar://7208839
+
+extern inline int f1 (void) {return 1;}
+int f3 (void) {return f1();}
+int f1 (void) {return 0;}