doc: fix deftypefn markup in gccint manual.

doc: fix deftypefn markup in gccint manual.

gcc/:
	* doc/gimple.texi: Fix quoting of multi-word return values in
	@deftypefn statements.  Ensure presence of return value.  Wrap
	overlong @deftypefn lines.
	(is_gimple_operand, is_gimple_min_invariant_address): Remove
	descriptions of removed functions.
	* doc/hostconfig.texi (Host Common): Wrap long line, fix quoting
	of multi-word return value in @deftypefn statement.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@168637 138bc75d-0d04-0410-961f-82ee72b054a4