gcc/
	* c.opt: Unify help texts for -Wdeprecated, -Wsystem-headers,
	and -fopenmp.

gcc/java/
	* lang.opt: Unify help text for -Wdeprecated.

gcc/fortran/
	* lang.opt: Unify help texts for -I, -Wconversion, -d, -fopenmp,
	and -fpreprocessed.

From-SVN: r144943