[binutils-gdb] Accept more epiphany targets

[sergiodj+buildbot@sergiodj.net]

*** TEST RESULTS FOR COMMIT 319c2dbe240a797c6f9436bfd64f5c16045ad5a1 ***

Author: Sebastian Huber <sebastian.huber@embedded-brains.de>
Branch: master
Commit: 319c2dbe240a797c6f9436bfd64f5c16045ad5a1

Accept more epiphany targets

In particular this adds support for the epiphany-rtems target.

bfd/
	* config.bfd (epiphany-*-elf): Accept epiphany-*-*.

ld/
	* configure.tgt (epiphany-*-elf): Accept epiphany-*-*.