MIPS/LD/testsuite: Resurrect `branch-misc-2' test

MIPS/LD/testsuite: Resurrect `branch-misc-2' test

Revert:

commit c9c1e416d7dd1a35bd7c1a96d034dca1d5071cd1
Author: Alexandre Oliva <aoliva@redhat.com>
Date:   Thu Dec 12 04:39:44 2002 +0000

<https://sourceware.org/ml/binutils/2002-11/msg00657.html>, ("mips:
branches to external labels are broken"), complementing:

commit bad36eacdad37042c4efb1c5fbf48476b47de82b
Author: Daniel Jacobowitz <drow@false.org>
Date:   Wed Nov 23 14:04:18 2005 +0000

<https://sourceware.org/ml/binutils/2005-11/msg00324.html>,
("R_MIPS_PC16, again").

	ld/
	* testsuite/ld-mips-elf/branch-misc-2.d: New test.
	* testsuite/ld-mips-elf/mips-elf.exp: Run it.