i#1551 Port DynamoRIO to ARM: refactor mangle_gpr_list_write - remove most ldm handling in mangle_indirect_jump - add normalize_ldm_instr to transform ldm{*} instructions - refactor mangle_gpr_list_write
i#1551 Port DynamoRIO to ARM: refactor mangle_gpr_list_write
- remove most ldm handling in mangle_indirect_jump
- add normalize_ldm_instr to transform ldm{*} instructions
- refactor mangle_gpr_list_write

Review-URL: https://codereview.appspot.com/206850043

sigma-random/dynamorio,daksunt/dynamorio,bl4ckic3/dynamorio,daksunt/dynamorio,bl4ckic3/dynamorio,sigma-random/dynamorio,code4bones/dynamorio,AmesianX/dynamorio,sigma-random/dynamorio,AmesianX/dynamorio,daksunt/dynamorio,bl4ckic3/dynamorio,code4bones/dynamorio,code4bones/dynamorio,sigma-random/dynamorio,AmesianX/dynamorio,AmesianX/dynamorio,bl4ckic3/dynamorio,code4bones/dynamorio,bl4ckic3/dynamorio,AmesianX/dynamorio,daksunt/dynamorio,code4bones/dynamorio,sigma-random/dynamorio,daksunt/dynamorio