tools: firmware-utils: update to Git HEAD (2024-06-30)

0cfd1043e6c4 zytrx: add ZyXEL LTE7490-M904
3d09357fc7b5 asusuimage: new tool for creating TRX-images compatible with AsusWRT
f35781fcd2c3 asusuimage: fix compile error with old GCC release

Link: https://github.com/openwrt/openwrt/pull/15840


Signed-off-by: Robert Marko <robimarko@gmail.com>