* cppexp.c: Redefine priority constants.

        (_cpp_parse_expr): Replace left and right priority scheme with
	single priority logic.  Move LOGICAL to same place as COMPARE.
	Remove bogus check for multiple unary +/- operators.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@32855 138bc75d-0d04-0410-961f-82ee72b054a4