Add 128-bit integer support in tritonToLLVM

[raax7]

Extended tritonToLLVM.cpp to support 128-bit integers.

• Expanded BV_NODE to handle 128-bit bit-vectors
• Added switch cases to argument type generation and BSWAP_NODE to select 128-bit integer types

[raax7]

During testing, I discovered a bug caused by certain ASTs that Triton can emit, such as:
((_ extract 127 0) (concat ((_ extract 511 128) (_ bv0 512)) xmm0))
This caused an exception to be thrown since the code only handled BV_NODEs with bit-widths less than 64-bits, or exactly 128-bits.
The fix for this issue I implemented is simply to extend BV_NODEs to handle bit-widths up to 512-bits.