Cargo bug?  "vendored" feature seems to leak even outside of targeting
arm-unknown-linux-gnu-eabhif or aarch64-unknown-linux-gnu.

This makes sure we are building with the system OpenSSL instead of
the bundled one.

--- Cargo.toml.orig	2020-06-15 08:01:34 UTC
+++ Cargo.toml
@@ -28,9 +28,3 @@ rayon = "1.3.0"
 semver = "0.10.0"
 url = "2.1.1"
 config = { version = "0.10.1", features = ["yaml", "json", "toml", "hjson", "ini"] }
-
-[target.arm-unknown-linux-gnueabihf.dependencies]
-openssl = { version = "0.10.29", features = ["vendored"] }
-
-[target.aarch64-unknown-linux-gnu.dependencies]
-openssl = { version = "0.10.29", features = ["vendored"] }