Fix docker tagging #86

Job	Run time
android-x86 / initialize	1m 48s
android-arm / initialize	1m 56s
android-arm64 / initialize	1m 53s
android-x86 / docker-build-image	4m 39s
android-arm64 / docker-build-image	4m 5s
android-arm / docker-build-image	4m 34s
android-arm64 / arm64_devel	52m 10s
android-arm64 / arm64_debug	50m 18s
android-arm64 / arm64_qa	51m 17s
android-arm64 / arm64_gold	56m 13s
android-x86 / x86_devel	1h 52m 23s
android-x86 / x86_debug	1h 55m 41s
android-x86 / x86_qa	1h 52m 49s
android-x86 / x86_gold	2h 34m 42s
android-arm / arm_devel	31m 54s
android-arm / arm_debug	40m 10s
android-arm / arm_qa	30m 40s
android-arm / arm_gold	42m 44s
	14h 29m 56s

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