gccrs: Add typecheck for path patterns.

gccrs: Add typecheck for path patterns.

gcc/rust/ChangeLog:

	* hir/tree/rust-hir.cc (Item::item_kind_string): New function.
	* hir/tree/rust-hir.h: New function.
	* typecheck/rust-hir-type-check-expr.cc (TypeCheckExpr::visit):
		Modify to check all arms in match expressions even if some of them
		has errors.
	* typecheck/rust-hir-type-check-pattern.cc (TypeCheckPattern::visit):
		Add and fix check for path patterns.

gcc/testsuite/ChangeLog:

	* rust/compile/issue-2324-2.rs: Fix error message.
	* rust/compile/match9.rs: New test.

Signed-off-by: Raiki Tamura <tamaron1203@gmail.com>