Add a test for -no-canonical-prefixes.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@215836 91177308-0d34-0410-b5e6-96231b3b80d8

test/Driver/no-canonical-prefixes.c

+// REQUIRES: shell
+// RUN: mkdir -p %t
+// RUN: cd %t
+// RUN: ln -sf %clang test-clang
+// RUN: ./test-clang -v -S %s 2>&1 | FileCheck %s
+// RUN: ./test-clang -v -S %s -no-canonical-prefixes 2>&1 | FileCheck --check-prefix=NCP %s
+
+
+// CHECK: /bin/clang{{.*}}" -cc1
+// NCP: test-clang" -cc1