GattClient: Update reference of the mbed lib to 5.9.1

pan- · pan- · commit c36d9c39dd2f · 2018-06-25T17:52:14.000+01:00
diff --git a/BLE_GattClient/mbed-os.lib b/BLE_GattClient/mbed-os.lib
@@ -1 +1 @@
-https://github.com/ARMmbed/mbed-os/#6e0d01cd13e8aca7bf4d697c3699ec9225386881
+https://github.com/ARMmbed/mbed-os/#03196b244ee00fc748cd4dbfa83b26f3fc0f376b

Original file line number	Diff line number	Diff line change
`@@ -1 +1 @@`
`1`		`-https://github.com/ARMmbed/mbed-os/#6e0d01cd13e8aca7bf4d697c3699ec9225386881`
	`1`	`+https://github.com/ARMmbed/mbed-os/#03196b244ee00fc748cd4dbfa83b26f3fc0f376b`