netctl: Add more error checking and more verbosity #1185

Job	Run time
build-minimal-sysroots (x86_64)	16m 50s
build-minimal-sysroots (riscv64)	19m 33s
build-minimal-sysroots (arm64)	16m 18s
build-toolchains (ubuntu-latest, x86_64, gnu)	22m 22s
build-toolchains (ubuntu-latest, riscv64, gnu)	23m 14s
build-toolchains (ubuntu-latest, arm64, gnu)	18m 15s
build-toolchains (ubuntu-20.04, x86_64, gnu)	23m 34s
build-toolchains (ubuntu-20.04, riscv64, gnu)	26m 32s
build-toolchains (ubuntu-20.04, arm64, gnu)	20m 23s
build-toolchains (ubuntu-latest, llvm, all)	1h 49m 45s
build-llvm	3m 9s
build	2m 53s
build-llvm-riscv64	2m 55s
build-arm64	0s
build-riscv	3m 8s
build-llvm-arm64	0s
run-riscv	0s
run-riscv64-llvm	0s
run-x86_64	0s
run-x86_64-llvm	0s
	5h 8m 51s

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