rust: bssl-macros: Add Apache-2.0 license

Change-Id: Iecb6c8b717ae13bfedcbd7171279d555cc91f0d9
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/92889
Auto-Submit: Raul Rangel <rrangel@google.com>
Commit-Queue: Raul Rangel <rrangel@google.com>
Reviewed-by: David Benjamin <davidben@google.com>
Commit-Queue: David Benjamin <davidben@google.com>

rust/bssl-macros/Cargo.toml

diff --git a/rust/bssl-macros/Cargo.toml b/rust/bssl-macros/Cargo.toml
index 5af1342..61012aa 100644
--- a/rust/bssl-macros/Cargo.toml
+++ b/rust/bssl-macros/Cargo.toml
@@ -2,5 +2,6 @@
 name = "bssl-macros"
 version = "0.1.0"
 edition = "2024"
+license = "Apache-2.0"
 
 [dependencies]