Don't store copied methods in BSS.

Otherwise, we can end up in a state where the method on the stack is
unrelated to the receiver.

Also fix a comment related to GetCanonicalMethod and
StackVisitor::ValidateFrame.

Test: 810-checker-invoke-super-default
Change-Id: I3030e4af6059f7a4a7a1f046f2aabae8ce9057da
14 files changed