fixed link issues on aarch64 musl

The linker was unable to find __addtf3, __multf3 and __subtf3.

Added target-feature=+crt-static and link-arg=-lgcc as a temporary
workaround. This seems to be the accepted fix in the Rust community:
rust-lang/compiler-builtins#201

A permanent fix is yet to be implemented in the Rust compiler.

Signed-off-by: Andreea Florescu <fandree@amazon.com>

.cargo/config

@@ -0,0 +1,2 @@
+[target.aarch64-unknown-linux-musl]
+rustflags = [ "-C", "target-feature=+crt-static", "-C", "link-arg=-lgcc" ]

CODEOWNERS

@@ -1,3 +1,3 @@
 # Add the list of code owners here (using their GitHub username)
 * gatekeeper-PullAssigner
-* danielverkamp
+* @danielverkamp

src/lib.rs

@@ -1,6 +1,6 @@
 // Copyright 2021 The Chromium OS Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
+//
+// SPDX-License-Identifier: Apache-2.0 OR BSD-3-Clause
 
 #![deny(missing_docs)]
 

src/writer.rs

@@ -1,6 +1,6 @@
 // Copyright 2021 The Chromium OS Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
+//
+// SPDX-License-Identifier: Apache-2.0 OR BSD-3-Clause
 
 //! This module writes Flattened Devicetree blobs as defined here:
 //! <https://devicetree-specification.readthedocs.io/en/stable/flattened-format.html>