Test

Build: add build-cache option to compile. #286

Job	Run time
multiple-arch-aarch64	31m 22s
cygwin64-cache	3m 29s
multiple-arch-armv7	31m 0s
utest-regression-blackbox-test	7m 20s
cygwin64	20m 8s
fast	2s
build-centos7	9m 12s
build-ubuntu16	5m 21s
build-ubuntu18	5m 41s
build-cross-aarch64	8m 35s
build-ubuntu20	4m 53s
build-cross-arm	7m 56s
coverage	5m 36s
multiple-arch-amd64	3m 8s
test-done	2s
	2h 23m 45s

Provide feedback