arm/armasm/testdata: add more decoding tests

More decoding tests are added. Most of them are
in gnu syntax and a few are in plan9 syntax.

Change-Id: Ifb96f5149f7f7c947f35948889a33f5dee50dbfc
Reviewed-on: https://go-review.googlesource.com/49190
Reviewed-by: Cherry Zhang <cherryyz@google.com>
Run-TryBot: Cherry Zhang <cherryyz@google.com>
1 file changed