[Bug-tar] testsuite.log too large for mailing lists

[Karl Berry]

Hi Sergey/all - when make check fails, it advises the user to email
testsuite.log to bug-tar.  That is nice in theory, but the log is big
these days, and there are a lot of people on bug-tar, ie, we're talking
a lot of bandwidth to distribute such a message.

I suggest changing the msg to say to compress the log first.  I expect
that would reduce the size greatly.

(Or is this an automake issue?  Probably.  But I'll write here first
anwyay.  I admit I'm sending this blind after user feedback, I don't
have a failing test at hand myself.  Some quick greps in the source did
not clarify.)

karl