[ABI] Completely reworked instruction DB and generators

* Instruction database is now part of asmjit to keep it in sync
  * X86/X64 ISA data has been reworked, now in a proper JSON format
  * ARM32 ISA data has been added (currently only DB, support later)
  * ARM64 ISA data has been added
  * ARM features detection has been updated

tools/gencommons.js

@@ -0,0 +1,23 @@
+// This file is part of AsmJit project <https://asmjit.com>
+//
+// See asmjit.h or LICENSE.md for license and copyright information
+// SPDX-License-Identifier: Zlib
+
+let VERBOSE = false;
+
+function DEBUG(msg) {
+  if (VERBOSE)
+    console.log(msg);
+}
+exports.DEBUG = DEBUG;
+
+function WARN(msg) {
+  console.log(msg);
+}
+exports.WARN = WARN;
+
+function FATAL(msg) {
+  console.log(`FATAL ERROR: ${msg}`);
+  throw new Error(msg);
+}
+exports.FATAL = FATAL;