[Bug translation/80001] diagnostics: untranslateable %s placeholders in omp-offload.c

[joseph at codesourcery dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80001

--- Comment #2 from joseph at codesourcery dot com <joseph at codesourcery dot 
com> ---
On Sat, 11 Mar 2017, roland.illig at gmx dot de wrote:

> error_at (loop->loc, loop->routine
>           ? "routine call uses same OpenACC parallelism as containing loop"
>           : "inner loop uses same OpenACC parallelism as containing loop");

With G_() around each diagnostic string so both get extracted for 
translation.