(Binary Analysis) Recapitalized SgAsmx86Instruction for ROSE 1.0 release

Correct capitalization is "X86", not "x86", as in "SgAsmX86Instruction".
Similarly for V_SgAsmx86Instruction, Asmx86Instruction, and isSgAsmx86Instruction.

Most users should be able to do a simple global search and replace.  ROSE
also has a "typedef SgAsmX86Instruction SgAsmx86Instruction" to help.
(Binary Analysis) Able to turn off listing from findSimilarFunctions