testsuite: lto: rename pr95677 test

This was being ignored previously. Rename it per README.

gcc/testsuite/ChangeLog:
	PR c++/95677

	* g++.dg/lto/pr95677.C: Move to...
	* g++.dg/lto/pr95677_0.C: ...here.

diff --git a/gcc/testsuite/g++.dg/lto/pr95677.C b/gcc/testsuite/g++.dg/lto/pr95677_0.C
similarity index 100%
rename from gcc/testsuite/g++.dg/lto/pr95677.C
rename to gcc/testsuite/g++.dg/lto/pr95677_0.C