Fix redundant comparison in gcc::Common::ConstructJob.

We were checking "Arch == llvm::Triple::x86_64 || Arch
== llvm::Triple::x86_64", but the rhs should actually check for
powerpc64.

Found while experimenting with a potential new Clang warning.

llvm-svn: 177496
diff --git a/clang/test/Driver/unknown-gcc-arch.c b/clang/test/Driver/unknown-gcc-arch.c
index 5e4746b..dcd17d4 100644
--- a/clang/test/Driver/unknown-gcc-arch.c
+++ b/clang/test/Driver/unknown-gcc-arch.c
@@ -1,8 +1,32 @@
-// RUN: %clang -target x86_64-unknown-unknown -c -x assembler %s -### 2> %t.log
-// RUN: grep '.*gcc.*"-m64"' %t.log
-// RUN: %clang -target x86_64-unknown-unknown -c -x assembler %s -### -m32 2> %t.log
-// RUN: grep '.*gcc.*"-m32"' %t.log
-// RUN: %clang -target i386-unknown-unknown -c -x assembler %s -### 2> %t.log
-// RUN: grep '.*gcc.*"-m32"' %t.log
-// RUN: %clang -target i386-unknown-unknown -c -x assembler %s -### -m64 2> %t.log
-// RUN: grep '.*gcc.*"-m64"' %t.log
+// RUN: %clang -target x86_64-unknown-unknown -c -x assembler %s -### 2>&1 \
+// RUN:   | FileCheck -check-prefix=X86_64 %s
+// X86_64: {{.*gcc.*-m64}}
+
+// RUN: %clang -target x86_64-unknown-unknown -c -x assembler %s -### -m32 2>&1 \
+// RUN:   | FileCheck -check-prefix=X86_64-M32 %s
+// X86_64-M32: {{.*gcc.*-m32}}
+
+// RUN: %clang -target i386-unknown-unknown -c -x assembler %s -### 2>&1 \
+// RUN:   | FileCheck -check-prefix=I386 %s
+// I386: {{.*gcc.*-m32}}
+
+// RUN: %clang -target i386-unknown-unknown -c -x assembler %s -### -m64 2>&1 \
+// RUN:   | FileCheck -check-prefix=I386-M64 %s
+// I386-M64: {{.*gcc.*-m64}}
+
+
+// RUN: %clang -target powerpc64-unknown-unknown -c -x assembler %s -### 2>&1 \
+// RUN:   | FileCheck -check-prefix=PPC64 %s
+// PPC64: {{.*gcc.*-m64}}
+
+// RUN: %clang -target powerpc64-unknown-unknown -c -x assembler %s -### -m32 2>&1 \
+// RUN:   | FileCheck -check-prefix=PPC64-M32 %s
+// PPC64-M32: {{.*gcc.*-m32}}
+
+// RUN: %clang -target powerpc-unknown-unknown -c -x assembler %s -### 2>&1 \
+// RUN:   | FileCheck -check-prefix=PPC %s
+// PPC: {{.*gcc.*-m32}}
+
+// RUN: %clang -target powerpc-unknown-unknown -c -x assembler %s -### -m64 2>&1 \
+// RUN:   | FileCheck -check-prefix=PPC-M64 %s
+// PPC-M64: {{.*gcc.*-m64}}