Backport of JDK-8303769.

Currently we get the asymmetric locking check in the interpreters wrong:

ldr(header_reg, Address(rthread, JavaThread::lock_stack_current_offset()));
cmpoop(header_reg, obj_reg);
br(Assembler::NE, slow_case);

The intention is to load the top of the lock-stack, and compare it to the unlocked object, and, if not equal, branch to the slow-path to handle it. However, what it really does is, it loads the *address* of the top of lock-stack, and compares that to the unlocked object. This can never succeed, and therefore we always call the slow-path. Additionally, the address is not the address of the topmost object, it is the address of the next free slot. What we really want to load is the element at -1 oop from that address. This is not incorrect, but it's unnecessarily slow.