ipa: Release body more carefully when removing nodes (PR 107944)

ipa: Release body more carefully when removing nodes (PR 107944)

The code removing function bodies when the last call graph clone of a
node is removed is too aggressive when there are nodes up the
clone_of chain which still need them.  Fixed by expanding the check.

gcc/ChangeLog:

2023-01-18  Martin Jambor  <mjambor@suse.cz>

	PR ipa/107944
	* cgraph.c (cgraph_node::remove): Check whether nodes up the
	lcone_of chain also do not need the body.

(cherry picked from commit db959e250077ae6b4fc08f53fb322719582c5de6)