i#1551 port to ARM: implement instr creation backend for macros

Implements routines needed for the ARM INSTR_CREATE_ macros:
+ instr_create_0dst_4src()
+ instr_create_2dst_5src()
+ instr_create_Ndst_Msrc_vardst()
+ instr_create_Ndst_Msrc_varsrc()

Changes the macro script to add a parameter to the var-arg routines giving
the number of registers in the register list as there's no way to determine
that automatically.

Also fixes the macro script to add a missing opnd_create_reg() around

git-svn-id: https://dynamorio.googlecode.com/svn/trunk@3014 49cc7528-f6fd-11dd-9d1a-b59b2e1864b6
4 files changed