Really commit the test case:

2011-11-28  Tobias Burnus  <burnus@net-b.de>

        PR fortran/51308
        * gfortran.dg/iso_c_binding_compiler_4.f90: New.

From-SVN: r181779

gcc/testsuite/gfortran.dg/iso_c_binding_compiler_4.f90

+! { dg-do compile }
+!
+! PR fortran/51308
+!
+! Contributed by Matthias Moeller
+!
+
+module mymod
+  use iso_c_binding
+  implicit none
+
+  private
+  public :: c_ptr
+  public :: c_null_ptr
+
+end module mymod
+
+! { dg-final { cleanup-modules "mymod" } }