Created usage output for oe-trim-schemas script.
[YOCTO #10751]
(From OE-Core rev: a9fac12157ed434a6711de1af77eda1f4a8e9e8a)
Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>