Bad function argument handling for arm thumb binaries

[karliss]

Expected result:

• Function arguments defined within rizin (name and type) matches with arguments of decompiled function

Actual result:

• argument type is applied correctly
• arguments names in signature are using param1, param2, param
• additional local variables with the same name and type as arguments

I observed this only when working with raw ARM thumb binaries. Didn't seem to affect x86-64 ELF files.