[patch] explicitly specify -std=gnu89 for gdb.cp/inline-break.exp

[Doug Evans]

On Fri, Apr 11, 2014 at 4:58 PM, David Blaikie <dblaikie@gmail.com> wrote:
> This test is intending to use gnu style inline rather than the
> standard c99 inline semantics. Clang defaults to c99 and the test
> breaks for this (and other - there's an inlining debug info quality
> bug here too - I'll file a bug and kfail the remaining failures in a
> separate patch) reason.

LGTM, but add a comment in the code explaining why the gnu89 is there.