[committed] Fix ICE for missing header fix-it hints with overlarge #line directives (PR c/84852)

[David Malcolm]

On Fri, 2018-03-16 at 10:18 +0000, Bin.Cheng wrote:
> On Thu, Mar 15, 2018 at 1:32 AM, Paul Hua <paul.hua.gm@gmail.com>
> wrote:
> > Hi:
> > 
> > The fixits-pr84852-1.c fails on mips64el target.
> 
> Hi,
> It fails on aarch64/arm bare-metal cross toolchains with different
> message like:
> ERROR: gcc.dg/fixits-pr84852-1.c: bad option "-812156810": must be
> -exact, -glob, -regexp, or -- for " dg-warning 15 "incompatible
> implicit declaration of built-in function 'strlen'" "" { target *-*-*
> } -812156810 "

Sorry about that.  I *think* that's coming from saved-dg-warning, which
is the dg-warning from DejaGnu.  Which version of DejaGnu is this with?

Works for me with 1.5.2