Re-add PKG_CONFIG_PATH for armhf image #3830

Job	Run time
cargo-deny	33s
check	30s
clippy (macos-latest)	53s
clippy (ubuntu-latest)	36s
clippy (windows-latest)	1m 42s
fmt	13s
generate-matrix	32s
shellcheck	10s
test (macos-latest)	2m 5s
test (ubuntu-latest)	1m 58s
test (windows-latest)	4m 52s
remote	0s
docker-in-docker	0s
bisect	0s
target (${{ matrix.pretty }},${{ matrix.os }})	0s
foreign	0s
podman	0s
publish	0s
conclusion	1s
Coverage	7s
	14m 12s

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