[patch, fortran] Fix another dependency check for reallocation on assignment

[Thomas Koenig]

Hello world,

in PR 66102, I found a patch by Mikael which has never been applied.
After dusting it off, finding that it looks reasonable and fixes
the test case in question I'd like to apply this.

Regression-tested. OK for trunk?

Regards

	Thomas

2017-07-23  Thomas Koenig  <tkoenig@gcc.gnu.org>
             Mikael Morin <mikael@gcc.gnu.org>

         PR fortran/66102
         * fortran/trans-array.c (gfc_conv_resolve_dependencies):
         Break if dependency has been found.

2017-07-23  Thomas Koenig  <tkoenig@gcc.gnu.org>
             Mikael Morin <mikael@gcc.gnu.org>

         PR fortran/66102
         * gfortran.dg/realloc_on_assign_28.f90:  New test.
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