gas output_file_close error message

Seen on arm-elf, where ELFOSABI_ARM is set too late to get a warning
when processing ifunc related directives on their source line.
../gas/as-new ifunc.s -o tmpdir/ifunc.o
../gas/as-new: symbol type STT_GNU_IFUNC is supported only by GNU and FreeBSD targets
ifunc.s: Assembler messages:
ifunc.s: Fatal error: can't close tmpdir/ifunc.o: sorry, cannot handle this file

This patch doesn't fix the real underlying problem, just the late
error message where "can't close" is a misdirection in this case.

	* output-file.c (output_file_close): Remove "can't close" from
	error message.
	* testsuite/gas/mips/reginfo-2.l: Update expected output.

gas/output-file.c

@@ -68,6 +68,5 @@ output_file_close (const char *filename)
   stdoutput = NULL;
 
   if (! res)
-    as_fatal (_("can't close %s: %s"), filename,
-	      bfd_errmsg (bfd_get_error ()));
+    as_fatal ("%s: %s", filename, bfd_errmsg (bfd_get_error ()));
 }