imx-usb-loader: bump to latest commit

Latest commit is from Oct 5, 2017. This adds support for the i.MX7
family.

Signed-off-by: Andrey Yurovsky <yurovsky@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/imx-usb-loader/imx-usb-loader.hash

@@ -1,2 +1,2 @@
 # locally computed
-sha256  5232292cb1ad853905357de59ed251b57060562dc8d7f1cce0bb6c0c8d280dae  imx-usb-loader-f04f225ebc1c38e81eb24745333c8622deda6b49.tar.gz
+sha256  717b64cec31f7e1167d4a31e4f511eea97ab80039dd435b7b183c6f41352213a imx-usb-loader-7e77787c83288a421080a9bf2f67063931f561be.tar.gz

package/imx-usb-loader/imx-usb-loader.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-IMX_USB_LOADER_VERSION = f04f225ebc1c38e81eb24745333c8622deda6b49
+IMX_USB_LOADER_VERSION = 7e77787c83288a421080a9bf2f67063931f561be
 IMX_USB_LOADER_SITE = $(call github,boundarydevices,imx_usb_loader,$(IMX_USB_LOADER_VERSION))
 IMX_USB_LOADER_LICENSE = LGPL-2.1+
 IMX_USB_LOADER_LICENSE_FILES = COPYING