Remove duplicate dependencies by patching, and add back links field

We don't want duplicate ctru-sys crates in the dependency graph. Same
for libc. We can patch them here to avoid any issues.

Now that we don't have duplicate ctru-sys crates, we can add back the
links field. This field is important because it warns us when there are
two crates linking to the same library (ex. duplicate ctru-sys crates).

Cargo.toml

@@ -1,2 +1,10 @@
 [workspace]
 members = ["ctru-rs", "ctru-sys"]
+
+[patch.crates-io]
+# We have some changes not in the upstream
+libc = { git = "https://github.com/Meziu/libc.git" }
+
+[patch.'https://github.com/Meziu/ctru-rs']
+# Make sure all dependencies use the local ctru-sys package
+ctru-sys = { path = "ctru-sys" }

ctru-sys/Cargo.toml

@@ -3,6 +3,7 @@ name = "ctru-sys"
 version = "0.4.0"
 authors = ["Ronald Kinard <furyhunter600@gmail.com>"]
 license = "https://en.wikipedia.org/wiki/Zlib_License"
+links = "ctru"
 edition = "2021"
 
 [dependencies]