[binutils-gdb] feature_to_c.sh: Print help when passing no arguments

[sergiodj+buildbot at sergiodj dot net]

*** TEST RESULTS FOR COMMIT 73519cce7cbe31609a2aa9c27955555237a0c51f ***

Author: Simon Marchi <simon.marchi@ericsson.com>
Branch: master
Commit: 73519cce7cbe31609a2aa9c27955555237a0c51f

feature_to_c.sh: Print help when passing no arguments

I found that odd that passing no arguments to feature_to_c.sh produces
this:

$ ./feature_to_c.sh
./feature_to_c.sh: 23: shift: can't shift that many

but passing one argument shows the help:

$ ./feature_to_c.sh hello
Usage: ./feature_to_c.sh OUTPUTFILE INPUTFILE...

This patch changes the script to show the help in both cases.

gdb/ChangeLog:

	* features/feature_to_c.sh: Print the help when passing no
	argument.