[Patch, Fortran] Add Fortran 2008 obsolescent support for ENTRY

[Tobias Burnus]

Fortran 2008 declares ENTRY as obsolescent. This patch adds the required
diagnostics for -std=f2008; with -std=f95/f2003/gnu/legacy it is still
supported - with -std=f2008 a warning is printed.

Build and currently regtesting on x86-64-linux. If it succeeds:
OK for the trunk?

Tobias
-------------- next part --------------
A non-text attachment was scrubbed...
Name: F2008-obs.diff
Type: text/x-patch
Size: 5768 bytes
Desc: not available
URL: <http://gcc.gnu.org/pipermail/fortran/attachments/20100623/0f8f59f8/attachment.bin>