binutils archive tests

binutils archive tests

There are a number of targets that don't support thin archives (*),
and vms doesn't even support file name extensions other than .obj for
archives containing object files.  This patch adjusts the testsuite
to cater for the vms restriction, and reenables testing for non-ELF
alpha targets.  That adds a few alpha-dec-vms fails and one
alpha-linuxecoff fail but testsuite fails on those targets are nothing
new.

(*) It might seem like they do if binutils is built with
--enable-plugins but the plugin archive support is broken, causing the
wrong type of archives to be created by ar for those targets.

	* testsuite/binutils-all/ar.exp (obj): Set up object file name
	extension.  Use throughout.  Don't completely exclude non-ELF
	alpha targets.  Run long_filenames test for tic30.  Exclude thin
	archive tests for aix, ecoff and vms.
	* estsuite/binutils-all/objdump.exp (obj): Set up object file name
	extension.  Use throughout.  Don't exclude non-ELF alpha targets
	from "bintest.a".