x86: Always update EH return address in word_mode

On x86, return address is always popped in word_mode.  eh_return needs
to put EH return address in word_mode on stack.

gcc/

	PR target/87014
	* config/i386/i386.md (eh_return): Always update EH return
	address in word_mode.

gcc/testsuite/

	PR target/87014
	* g++.dg/torture/pr87014.C: New file.

From-SVN: r263672