Fix PR middle-end/102764

Fix PR middle-end/102764

This is a regression present on the mainline in the form of -fcompare-debug
failure at -O3 on a compiler-generated testcase.  Fixed by disregarding a
debug statement in the last position of a basic block to reset the current
location for the outgoing edges.

gcc/
	PR middle-end/102764
	* cfgexpand.c (expand_gimple_basic_block): Disregard a final debug
	statement to reset the current location for the outgoing edges.

gcc/testsuite/
	* gcc.dg/pr102764.c: New test.