delete tool/instruction.rb

Previous commit changed insns.def format. Now is the time for its
generators. In doing so I chose to modernize the system, not just
patch.  My attempt includes

- extensive use of Onigumo regular expressions
- split from one big file (instruction.rb) into separated MVC
- partial view

Also, let me take this opportunity to kill old unused features
such as

- stack caching
- minsns / yasmdata which are never seriously used
- yarvarch document generation (moved to doc/)
- vast majority of unused arguments to insns2vm.rb

This commit generates VM source codes that cleanly compile, and
the generated binary passes tests.  At least for me.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@61733 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

vm_exec.h

@@ -189,4 +189,7 @@ default:                        \
 #define CHECK_VM_STACK_OVERFLOW_FOR_INSN(cfp, margin)
 #endif
 
+#define INSN_LABEL2(insn, name) INSN_LABEL_ ## insn ## _ ## name
+#define INSN_LABEL(x) INSN_LABEL2(NAME_OF_CURRENT_INSN, x)
+
 #endif /* RUBY_VM_EXEC_H */