[committed] gfortran.dg/compiler-directive_2.f: Update dg-error (was: [Patch, v2] OpenMP/Fortran: Fix handling of 'declare target' with 'link' clause [PR115559])

[Tobias Burnus]

Follow up fix:

As the !GCC$ attributes are now added in reverse order,
the 'stdcall' vs. 'fastcall' in the error message swapped order:
 "Error: stdcall and fastcall attributes are not compatible" This didn't 
show up here with -m64 ("Warning: 'stdcall' attribute ignored") and I 
didn't run it with -m32, but it was reported by Haochen's script +
manually confirmed by him.
(Thanks for the report and checking – and sorry for the FAIL.)
Committed asr15-2401-g15158a8853a69f. Tobias