ubsan: Also disable vptr validation on powerpc64le.

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@247499 91177308-0d34-0410-b5e6-96231b3b80d8

Author: pcc

test/ubsan/lit.common.cfg

@@ -78,5 +78,6 @@ if config.host_os == 'Windows':
 if config.target_arch.startswith('arm') == False:
   config.available_features.add('stable-runtime')
 
-if config.host_os == 'Linux' and config.target_arch != 'powerpc64':
+if config.host_os == 'Linux' and config.target_arch != 'powerpc64' and \
+   config.target_arch != 'powerpc64le':
   config.available_features.add('vptr-validation')