Fortran: Testsuite, fix differences in type naming.

Continued on 0c13f7e5
(fortran: Testsuite, fix different type naming across compilers).

2016-06-08  Bernhard Heckel  <bernhard.heckel@intel.com>

gdb/Testsuite/Changelog:
	* gdb.fortran/vla-value.exp: Use type names defined in libfortran.
	* gdb.mi/mi-var-child-f.exp: Likewise.
	* gdb.mi/mi-vla-fortran.exp: Likewise.

Change-Id: I7ee94587a992add27fec77c7726f9a69c8fdf373