[gomp4] don't error on implicitly private induction variables in gfortran

[Cesar Philippidis]

While experimenting with some new OpenACC benchmarks, I noticed that
gfortran errors when the user explicitly marks loop induction variables
as private. I applied this patch to gomp-4_0-branch to resolve that problem.

Cesar
-------------- next part --------------
A non-text attachment was scrubbed...
Name: gomp4-gfc-implifictly-private.diff
Type: text/x-patch
Size: 1461 bytes
Desc: not available
URL: <http://gcc.gnu.org/pipermail/gcc-patches/attachments/20170127/9b033770/attachment.bin>