modules: fix wireguard repo branch #362

Job	Run time
generate_target_matrix	6s
build_firmware (ar71xx-generic)	50s
build_firmware (ar71xx-mikrotik)	1m 9s
build_firmware (ar71xx-nand)	1m 49s
build_firmware (ar71xx-tiny)	1m 32s
build_firmware (ath79-generic)	1m 39s
build_firmware (brcm2708-bcm2708)	38s
build_firmware (brcm2708-bcm2709)	1m 54s
build_firmware (brcm2708-bcm2710)	1m 41s
build_firmware (ipq40xx-generic)	57s
build_firmware (ipq806x-generic)	1m 29s
build_firmware (lantiq-xrx200)	1m 27s
build_firmware (lantiq-xway)	1m 41s
build_firmware (mpc85xx-generic)	1m 37s
build_firmware (mpc85xx-p1020)	1m 22s
build_firmware (mvebu-cortexa9)	1m 20s
build_firmware (ramips-mt7620)	1m 40s
build_firmware (ramips-mt7621)	1m 28s
build_firmware (ramips-mt76x8)	1m 34s
build_firmware (ramips-rt305x)	45s
build_firmware (sunxi-cortexa7)	2m 5s
build_firmware (x86-64)	58s
build_firmware (x86-generic)	46s
build_firmware (x86-geode)	1m 41s
build_firmware (x86-legacy)	1m 44s
create_release	0s
	33m 52s

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