Force column info only for direct inlined functions. This should strike
the balance between expected behavior and compatibility with the gdb
testsuite.
(GDB gets confused if we break an expression into multiple debug
stmts so we enable this behavior only for inlined functions. For the
full experience people can still use -gcolumn-info.)

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@177164 91177308-0d34-0410-b5e6-96231b3b80d8