c++: EOF location [PR 96045]

c++: EOF location [PR 96045]

Setting the EOF token location to be the start of a line just after
the ending newline is not most helpful.  While that location is
probably the right place to report preprocessing and lexing issues,
when parsing, the location just after the last token is better.  That
way we get to point at some actual text.  Setting the location from
the previous token has the advantage over just setting the location to
be the end of the final line, in that any ending comments do not get
considered, which I think is better.

	PR c++/96045
	gcc/cp/
	* parser.c (cp_lexer_new_main): Adjust EOF token location.
	gcc/testsuite/
	* g++.dg/diagnostic/pr96045-1.C: New.
	* g++.dg/diagnostic/pr96045-2.C: New.
	* g++.dg/diagnostic/pr96045-3.C: New.
	* c-c++-common/goacc/pr79428-1.c: Adjust EOF diagnostic location.
	* c-c++-common/gomp/pr79428-2.c: Likewise
	* c-c++-common/raw-string-6.c: Likewise
	* g++.dg/cpp0x/decltype63.C: Likewise
	* g++.dg/cpp0x/gen-attrs-64.C: Likewise
	* g++.dg/cpp0x/pr68726.C: Likewise
	* g++.dg/cpp0x/pr78341.C: Likewise
	* g++.dg/cpp1y/pr65202.C: Likewise
	* g++.dg/cpp1y/pr65340.C: Likewise
	* g++.dg/cpp1y/pr68578.C: Likewise
	* g++.dg/cpp1z/class-deduction44.C: Likewise
	* g++.dg/diagnostic/unclosed-extern-c.C: Likewise
	* g++.dg/diagnostic/unclosed-function.C: Likewise
	* g++.dg/diagnostic/unclosed-namespace.C: Likewise
	* g++.dg/diagnostic/unclosed-struct.C: Likewise
	* g++.dg/ext/pr84598.C: Likewise
	* g++.dg/other/switch4.C: Likewise
	* g++.dg/parse/attr4.C: Likewise
	* g++.dg/parse/cond4.C: Likewise
	* g++.dg/parse/crash10.C: Likewise
	* g++.dg/parse/crash18.C: Likewise
	* g++.dg/parse/crash27.C: Likewise
	* g++.dg/parse/crash34.C: Likewise
	* g++.dg/parse/crash35.C: Likewise
	* g++.dg/parse/crash52.C: Likewise
	* g++.dg/parse/crash59.C: Likewise
	* g++.dg/parse/crash61.C: Likewise
	* g++.dg/parse/crash67.C: Likewise
	* g++.dg/parse/error14.C: Likewise
	* g++.dg/parse/error56.C: Likewise
	* g++.dg/parse/invalid1.C: Likewise
	* g++.dg/parse/parameter-declaration-1.C: Likewise
	* g++.dg/parse/parser-pr28152-2.C: Likewise
	* g++.dg/parse/parser-pr28152.C: Likewise
	* g++.dg/parse/pr68722.C: Likewise
	* g++.dg/parse/pr96258.C: Likewise
	* g++.dg/pr46852.C: Likewise
	* g++.dg/pr46868.C: Likewise
	* g++.dg/template/crash115.C: Likewise
	* g++.dg/template/crash43.C: Likewise
	* g++.dg/template/crash90.C: Likewise
	* g++.dg/template/error-recovery1.C: Likewise
	* g++.dg/template/error57.C: Likewise
	* g++.old-deja/g++.other/crash31.C: Likewise