Skip freebsd driver test when ppc32/ppc64 targets are not configured.

Otherwise, the clang driver falls back to invoking gcc and the ppc tests
fail.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@149793 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Driver/freebsd.c b/test/Driver/freebsd.c
index e022464..c860c3b 100644
--- a/test/Driver/freebsd.c
+++ b/test/Driver/freebsd.c
@@ -1,3 +1,4 @@
+// REQUIRES: ppc32-registered-target,ppc64-registered-target
 // RUN: %clang -no-canonical-prefixes -target powerpc-pc-freebsd8 %s \
 // RUN:   --sysroot=%S/Inputs/basic_freebsd_tree -### 2>&1 \
 // RUN:   | FileCheck --check-prefix=CHECK-PPC %s