Minor updates

 Removed unused utility functions and renamed variables

Add two crash cases

* Add crash-36-x64-execution-aborted.c
* Add crash-37-x64-segfault-in-doit.c

Changed argument types for ks_option and ks_free functions

Added Haskell bindings

Both samples/sample.c and bindings/haskell/sample/Sample.hs produce the same
output

* ks_free: The 'p' argument should have type unsigned char* to match the type of the 'encoding' argument to ks_asm

Add six round-trip failures.

Add crash case crash-35-x64-this-is-not-an-immediate.c

Create arm_blx_rel_thumb2.py

 blx thumb bug #166

Merge branch 'improvement/generate-pkg-config' of https://github.com/adrianherrera/keystone into adrianherrera-improvement/generate-pkg-config

Add three crash cases

This is required for when I get around to writing some Haskell bindings :-)

Add two round-trip failures

Improve crash case readability.

Add new round-trip test cases.