LexerTest memory leak fix-

A new LexerTest unittest introduced a memory leak.  This patch
uses a unique_ptr with a custom deleter to ensure it is properly
deleted.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@305491 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed