expose type "cs_x86_encoding" for X86InsnDetail please

[persytry]

expose type "cs_x86_encoding" for X86InsnDetail please, thanks

[tmfink]

@persytry thanks for the enhancement request. I even have this as a "todo" comment currently:

capstone-rs/capstone-rs/src/arch/x86.rs

Lines 27 to 28 in 74ccb09

	// todo(tmfink): expose new types cs_x86__bindgen_ty_1, cs_x86_encoding, x86_xop_cc,
	// cs_x86_op::access

[3n16m4]

Please take a look at #147 this PR closes this issue.