PR c++/69317 - [6 regression] wrong ABI version in -Wabi warnings

PR c++/69317 - [6 regression] wrong ABI version in -Wabi warnings

gcc/cp/ChangeLog:
2016-01-27  Martin Sebor  <msebor@redhat.com>

	PR c++/69317
	* mangle.c (mangle_decl): Reference the correct (saved) version
	of the ABI in -Wabi diagnostics.

gcc/testsuite/ChangeLog:
2016-01-27  Martin Sebor  <msebor@redhat.com>

	PR c++/69317
	* g++.dg/abi/Wabi-2-2.C: New test.
	* g++.dg/abi/Wabi-2-3.C: New test.
	* g++.dg/abi/Wabi-3-2.C: New test.
	* g++.dg/abi/Wabi-3-3.C: New test.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@232881 138bc75d-0d04-0410-961f-82ee72b054a4