Recognize more StdlibUnittest output both in our emacs error parsing
and in the line-directive tool.
Corrected a bug in the emacs error support that caused it to mask one
error format with a second one having the same name
Swift SVN r23464
Diagnostic output from compiling .swift files is now passed through the
line-directive tool so that errors point back at the original .gyb
files.
Swift SVN r15674