Specify -ccc-clang-archs for le32 targets which may not be supported by default.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@141062 91177308-0d34-0410-b5e6-96231b3b80d8

test/Driver/le32-unknown-nacl.cpp

-// RUN: %clang -ccc-host-triple le32-unknown-nacl -ccc-echo %s -emit-llvm-only -c 2>&1 | FileCheck %s -check-prefix=ECHO
-// RUN: %clang -ccc-host-triple le32-unknown-nacl %s -emit-llvm -S -c -o - | FileCheck %s
-// RUN: %clang -ccc-host-triple le32-unknown-nacl %s -emit-llvm -S -c -pthread -o - | FileCheck %s -check-prefix=THREADS
+// RUN: %clang -ccc-host-triple le32-unknown-nacl -ccc-clang-archs le32 -ccc-echo %s -emit-llvm-only -c 2>&1 | FileCheck %s -check-prefix=ECHO
+// RUN: %clang -ccc-host-triple le32-unknown-nacl -ccc-clang-archs le32 %s -emit-llvm -S -c -o - | FileCheck %s
+// RUN: %clang -ccc-host-triple le32-unknown-nacl -ccc-clang-archs le32 %s -emit-llvm -S -c -pthread -o - | FileCheck %s -check-prefix=THREADS
 
 // ECHO: {{.*}} -cc1 {{.*}}le32-unknown-nacl.c