Generate a "trampoline" that jumps to the shared lazy compilation stub.
This is then copied into individual TIBs.
We do this to enable the optimizing compiler to use ptr equality of
target instructions to imply logical (source) equality of target methods.
This is used to perform guarded inlining using the "method test."
Without per-class lazy compilation trampolines, ptr equality of target
instructions does not imply source equality, since both targets may in fact
be the globally shared lazy compilation stub.