Stream ipa_return_value_summary

Stream ipa_return_value_summary

Add streaming of return summaries from compile time to ltrans
which are now needed for vrp to not ouput false errors on musttail.

	Co-authored-by: Jakub Jelinek <jakub@redhat.com>
gcc/ChangeLog:
	PR tree-optimization/119614

	* ipa-prop.cc (ipa_write_return_summaries): New function.
	(ipa_record_return_value_range_1): Break out from ....
	(ipa_record_return_value_range): ... here.
	(ipa_read_return_summaries): New function.
	(ipa_prop_read_section): Read return summaries.
	(read_ipcp_transformation_info): Read return summaries.
	(ipcp_write_transformation_summaries): Write return summaries;
	do not stream stray 0.

gcc/testsuite/ChangeLog:

	* g++.dg/lto/pr119614_0.C: New test.