RFA (Makefiles): PATCH to include libcpp and libiberty in GCC etags

[Jeff Law]

On 10/28/2015 12:49 PM, Jason Merrill wrote:
> Periodically I try to use M-. to pull up a function from libcpp and am
> frustrated that it doesn't work.  This patch fixes that, and throws in
> libiberty for good measure.
>
> I also considered using --include for the TAGS files in those
> directories, but that would require people to 'make TAGS' separately in
> those directories for it to work, so I decided to go this way instead.
>
> OK for trunk?
Looks like you attached the wrong patch :-)

Jeff