[ARM] Help wince objdump on coproc tests

[ARM] Help wince objdump on coproc tests

Object files other than ELF do not have mapping symbols to indicate the
type of data for objdump to work reliably. This is why the following
tests FAIL on arm-wince-pe targets:
ARMv6T2 Thumb CoProcessor Instructions (1)
ARMv6T2 Thumb CoProcessor Instructions (2)

This patch adds the force-thumb disassembler option to objdump for this
test to PASS on these targets as well.

2017-11-02  Thomas Preud'homme  <thomas.preudhomme@arm.com>

gas/
	* testsuite/gas/arm/copro-thumb_v6t2plus-thumb_v6t2-1.d: Add
	--disassembler-options=force-thumb to objdump options.
	* testsuite/gas/arm/copro-thumb_v6t2plus-thumb_v6t2-2.d: Likewise.