No canonical-prefixes match in avr-toolchain.c.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@291096 91177308-0d34-0410-b5e6-96231b3b80d8

test/Driver/avr-toolchain.c

 // A basic clang -cc1 command-line.
 
-// RUN: %clang %s -### -target avr 2>&1 | FileCheck -check-prefix=CC1 %s
+// RUN: %clang %s -### -no-canonical-prefixes -target avr 2>&1 | FileCheck -check-prefix=CC1 %s
 // CC1: clang{{.*}} "-cc1" "-triple" "avr"