add dependencies for `pkg-config`
add dependencies for `pkg-config`

Otherwise, it complains:

    run pkg_config fail: "Failed to run `\"pkg-config\" \"--libs\" \"--cflags\" \"openssl\"`: No such file or directory (os error 2)"
tsurai/cargo,rustyhorde/cargo,tsurai/cargo,nipunn1313/cargo,eminence/cargo,vojtechkral/cargo,rust-lang/cargo,tsurai/cargo,nipunn1313/cargo,tshepang/cargo,eminence/cargo,rust-lang/cargo,vojtechkral/cargo,vojtechkral/cargo,rust-lang/cargo,eminence/cargo,eminence/cargo,tshepang/cargo,nipunn1313/cargo,rustyhorde/cargo,tshepang/cargo,tsurai/cargo,vojtechkral/cargo,rust-lang/cargo,nipunn1313/cargo,tsurai/cargo,tshepang/cargo,rustyhorde/cargo,rustyhorde/cargo