Fix PR binutils/26356 on hppa*-*-hpux*.

Fix PR binutils/26356 on hppa*-*-hpux*.

	PR 26356
	* som.c (som_bfd_copy_private_section_data): Issue error when a
	subspace is specified without its containing space.
	* testsuite/binutils-all/objcopy.exp (objcopy --reverse-bytes): Add
	"-j $PRIVATE$" to command on hppa*-*-hpux*.
	* testsuite/lib/utils-lib.exp (default_binutils_run): Remove existing
	dollar-sign quotes before quoting.  Do this prior to generating log
	output.