[clang][test] Disable opaque pointers in test

Was missed in opaque pointer switch due to not being run on x86.

Author: aeubanks

clang/test/CodeGen/PowerPC/ppc-mm-malloc-le.c

@@ -6,7 +6,7 @@
 // require installing target headers in build env, otherwise expecting
 // failures. So this test will focus on native build only.
 
-// RUN: %clang -target powerpc64le-unknown-linux-gnu -S -emit-llvm %s -fno-discard-value-names -mllvm -disable-llvm-optzns -o - | llvm-cxxfilt | FileCheck %s
+// RUN: %clang -Xclang -no-opaque-pointers -target powerpc64le-unknown-linux-gnu -S -emit-llvm %s -fno-discard-value-names -mllvm -disable-llvm-optzns -o - | llvm-cxxfilt | FileCheck %s
 
 #include <mm_malloc.h>