test/Driver/prefixed-tools.c: Disable this on win32 hosts, msvc and mingw.

It had failed on Win32 due to inability of executing shell scripts.
Still it fails even with mingw MSYS bash.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@149100 91177308-0d34-0410-b5e6-96231b3b80d8

test/Driver/prefixed-tools.c

@@ -2,6 +2,10 @@
 // RUN: env PATH=%s-helper %clang -no-integrated-as -m32 -target x86_64--linux %s -o - >> %t.log
 // RUN: FileCheck -input-file %t.log %s
 
+// FIXME: It had failed on Win32 due to inability of executing shell scripts.
+// Still it fails even with mingw MSYS bash.
+// REQUIRES: shell
+
 // CHECK: x86_64--linux-as called
 // CHECK: x86_64--linux-ld called
 // CHECK: x86_64--linux-as called