fortran: strengthen the storage_size() check

It's not enough to AC_COMPILE_IFELSE, do AC_LINK_IFELSE to really make
sure the compiler suite supports it.

Refs trac:4917

This commit was SVN r32802.

The following Trac tickets were found above:
  Ticket 4917 --> https://svn.open-mpi.org/trac/ompi/ticket/4917

config/ompi_fortran_check_storage_size.m4

@@ -30,7 +30,7 @@ AC_DEFUN([OMPI_FORTRAN_CHECK_STORAGE_SIZE],[
     AC_CACHE_CHECK([if Fortran compiler supports STORAGE_SIZE for relevant types],
        fortran_storage_size_var,
        [AC_LANG_PUSH([Fortran])
-        AC_COMPILE_IFELSE([AC_LANG_SOURCE([[program check_for_storage_size
+        AC_LINK_IFELSE([AC_LANG_SOURCE([[program check_for_storage_size
     USE, INTRINSIC :: iso_fortran_env, ONLY: REAL32, INT32
     integer size
     complex(real32) :: c32