Make all darwin ppc stubs local.

This fixes pr15763.
Patch by David Fang.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@180657 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/PowerPC/stubs.ll b/test/CodeGen/PowerPC/stubs.ll
index cfcc50b..694f208 100644
--- a/test/CodeGen/PowerPC/stubs.ll
+++ b/test/CodeGen/PowerPC/stubs.ll
@@ -6,16 +6,16 @@
 }
 
 ; CHECK: _test1:
-; CHECK: bl ___floatditf$stub
+; CHECK: bl L___floatditf$stub
 ; CHECK: 	.section	__TEXT,__symbol_stub1,symbol_stubs,pure_instructions,16
-; CHECK: ___floatditf$stub:
+; CHECK: L___floatditf$stub:
 ; CHECK: 	.indirect_symbol ___floatditf
-; CHECK: 	lis r11, ha16(___floatditf$lazy_ptr)
-; CHECK: 	lwzu r12, lo16(___floatditf$lazy_ptr)(r11)
+; CHECK: 	lis r11, ha16(L___floatditf$lazy_ptr)
+; CHECK: 	lwzu r12, lo16(L___floatditf$lazy_ptr)(r11)
 ; CHECK: 	mtctr r12
 ; CHECK: 	bctr
 ; CHECK: 	.section	__DATA,__la_symbol_ptr,lazy_symbol_pointers
-; CHECK: ___floatditf$lazy_ptr:
+; CHECK: L___floatditf$lazy_ptr:
 ; CHECK: 	.indirect_symbol ___floatditf
 ; CHECK: 	.long dyld_stub_binding_helper