This test doesn't need -O2 -disable-llvm-optzns

I forgot to fix this one in r209145. We use these flags on dllimport tests
to make sure we emit code for available_externaly functions and don't inline
the IR.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@209564 91177308-0d34-0410-b5e6-96231b3b80d8

test/CodeGen/dllexport.c

-// RUN: %clang_cc1 -triple i686-pc-win32 -std=c99 -O2 -disable-llvm-optzns -emit-llvm < %s | FileCheck %s
+// RUN: %clang_cc1 -triple i686-pc-win32 -std=c99 -emit-llvm < %s | FileCheck %s
 
 #define DLLEXPORT __declspec(dllexport)