Fix EH handling corner case.

Fix EH handling corner case.

	* mini.c (create_jit_info): Handle the case where the basic
	block right after a try block is dead. For example:
	.try {
		....
		leave ...
	}
	nop //HERE
	.catch {
		...
	}

	The above nop is dead code and the branch opts will nullify it
	which caused the code in create_jit_info to assert when
	calculating the try block lenght.

	This is a very rare case since only obfuscators or broken
	compilers would put instruction between the try and handler
	blocks.

	The fix is to simply iterate over all CIL addresses of the
	try block in reverse order looking for the first block which
	was not removed.

	Fixes 633291