Make -include, -imacros paths absolute in Frontend.
 - Otherwise paths will be resolved relative to the main input file,
   which is incorrect.

 - I don't know how to make a reasonable test case for this with our
   testing infrastructure.

 - PR3395


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@68665 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed