Build rescue table on the fly.
Revert "Align IR and AST interpreter constant caching."

This reverts commit 0b75957ac1831271cf1962ec98258fb166c3cb4f.

Conflicts:
	core/src/main/java/org/jruby/ir/instructions/SearchConstInstr.java
	core/src/main/java/org/jruby/ir/interpreter/Interpreter.java
Get search_const and inheritance_search_const working properly.