S/390: Fix MASK_RIE_R0PI and MASK_RIE_R0PU.

S/390: Fix MASK_RIE_R0PI and MASK_RIE_R0PU.

This makes objdump to be able to recognize some of the extended
mnemonics more often.  It does not lead to wrong being generated.

opcodes/ChangeLog:

2015-09-10  Andreas Krebbel  <krebbel@linux.vnet.ibm.com>

	* s390-opc.c: Fix MASK_RIE_R0PI and MASK_RIE_R0PU.

gas/testsuite/ChangeLog:

2015-09-10  Andreas Krebbel  <krebbel@linux.vnet.ibm.com>

	* gas/s390/zarch-z10.d: Fix testcase for compare and branch
	extended mnemonics.