demangle.h (DMGL_RET_POSTFIX): Extend the comment.

demangle.h (DMGL_RET_POSTFIX): Extend the comment.

include/
	* demangle.h (DMGL_RET_POSTFIX): Extend the comment.
	(DMGL_RET_DROP): New.

libiberty/
	* cp-demangle.c (d_print_comp) <DEMANGLE_COMPONENT_FUNCTION_TYPE>: Do
	not pass DMGL_RET_POSTFIX or DMGL_RET_DROP.  Support DMGL_RET_DROP.
	* testsuite/demangle-expected: New testcases for --ret-drop.
	* testsuite/test-demangle.c: Document --ret-drop in a comment.
	(main): New variable ret_drop, fill it, call cplus_demangle with it.

From-SVN: r175000