refactor: only include OpenThread-relevant bindings (#63)

* refactor!: make the internal bindings module private

* refactor: only include OpenThread-relevant bindings

Instead of blocklisting some specific items, let's just only include
any items that start with "ot" or "OT_". This removes a lot of noise
from the bindings and also makes them more portable.

The only difference between the riscv* and the thumb* bindings is now
the different enum representation, so technically we now only need two
sets of bindings instead of four.

* chore: update the vendored bindings and libraries

The new libraries are now compiled using clang and the new sysroot.

Author: scootermon

openthread-sys/gen/builder.rs

@@ -95,14 +95,8 @@ impl OpenThreadBuilder {
             .derive_debug(false)
             .derive_default(true)
             .layout_tests(false)
-            .blocklist_function("strtold")
-            .blocklist_function("_strtold_r")
-            .blocklist_function("v.*printf")
-            .blocklist_function("v.*scanf")
-            .blocklist_function("_v.*printf_r")
-            .blocklist_function("_v.*scanf_r")
-            .blocklist_function("q.*cvt")
-            .blocklist_function("q.*cvt_r")
+            .allowlist_item("ot.*")
+            .allowlist_item("OT_.*")
             .header(
                 self.crate_root_path
                     .join("gen")