* c-decl.c, tree.c, tree.h, objc/objc-act.c: Revert bitfield
	patch.
	* gcc.dg/bitfld-1.c: Update.
	* gcc.dg/bitfld-2.c: Update.
	* gcc.c-torture/execute/bitfld-1.x: New.

From-SVN: r49420