CI: Add arm builds to the matrix #1728

Job	Run time
build-installer (3.4.1, x86-msvcrt, 3.1.6/x64, v3_4_1)	17m 41s
build-installer (3.4.1, x64-ucrt, 3.1.6/x64, v3_4_1)	17m 21s
build-installer (3.4.1, arm-ucrt, 3.1.6/x64, v3_4_1)	12m 55s
build-installer (3.3.7, x86-msvcrt, 3.1.6/x64, v3_3_6)	14m 33s
build-installer (3.3.7, x64-ucrt, 3.1.6/x64, v3_3_6)	18m 28s
build-installer (3.2.6, x86-msvcrt, 3.1.6/x64, v3_2_6)	17m 17s
build-installer (3.2.6, x64-ucrt, 3.1.6/x64, v3_2_6)	15m 26s
build-installer (3.1.6, x86-msvcrt, 3.0.7/x64, v3_1_6)	15m 50s
build-installer (3.1.6, x64-ucrt, 3.0.7/x64, v3_1_6)	16m 34s
build-installer (head, x64-ucrt, 3.0.7/x64, master)	17m 43s
build-installer (head, x86-msvcrt, 3.0.7/x64, master)	17m 8s
build-installer (head, arm-ucrt, 3.1.6/x64, master)	14m 53s
	3h 15m 49s

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