[Patch] [Makefile] Exit if provided an incorrect argument

[Matthew Malcomson <Matthew dot Malcomson at arm dot com>]

At the moment the ./testrun.sh file generated for testing a new glibc
doesn't handle incorrect arguments well.
It prints the usage of the script in an infinite loop.

This patch stops the infinite loop by exiting the program.

Tested by manually running the script after building.
I don't have commit rights, so if OK could someone commit this for me.
OK for master?

ChangeLog:

2018-11-29  Matthew Malcomson  <matthew.malcomson@arm.com>

	* Makefile (testrun.sh): Exit if provided incorrect arg.


diff --git a/Makefile b/Makefile
index b4703e48fec93075cd5e3ddd83469705d2fee8f8..1e1866be3da1ba4520911eb27016544de419161b 100644
--- a/Makefile
+++ b/Makefile
@@ -148,6 +148,7 @@ while test $$# -gt 0 ; do
       ;;
     --*)
       usage
+      exit 1
       ;;
     *)
       break

Attachment: testrun-help-fix.patch
Description: testrun-help-fix.patch