[binutils-gdb] Fix RL78 disassembly so that SP+OFFSET addressing always shows the offset, even when zero.

[sergiodj+buildbot@redhat.com]

*** TEST RESULTS FOR COMMIT 02f12cd4669463a1b2346145808213adeb303e2d ***

Author: Vinay Kumar <vinay.g@kpit.com>
Branch: master
Commit: 02f12cd4669463a1b2346145808213adeb303e2d

Fix RL78 disassembly so that SP+OFFSET addressing always shows the offset, even when zero.

	PR binutils/19157
opcodes	* rl78-decode.opc: Add 'a' print operator to mov instructions
	using stack pointer plus index addressing.
	* rl78-decode.c: Regenerate.

tests	* gas/rl78: New directory.
	* gas/rl78/rl78.exp: New test driver.
	* gas/rl78/pr19157.s: New test source file.
	* gas/rl78/pr19157.d: New test case.