fix: patch aws-lc-sys with iOS cross-compilation fix

aws-lc-sys 0.38.0 fails to compile urandom.c for aarch64-apple-ios on
Xcode 16.2 because target.h doesn't include <TargetConditionals.h>,
so OPENSSL_IOS is never defined and the build falls through to the
Linux urandom path.

Patch points at lukejmann/aws-lc-rs#fix/ios-cross-compilation which:
1. Adds #include <TargetConditionals.h> to target.h (root cause)
2. Guards RNDGETENTCNT/ioctl in urandom.c behind OPENSSL_LINUX (defensive)

Made-with: Cursor

Author: lukejmann

Cargo.lock

@@ -37,6 +37,9 @@ nursery = { level = "deny", priority = -1 }
 missing_docs = "deny"
 dead_code = "deny"
 
+[patch.crates-io]
+aws-lc-sys = { git = "https://github.com/lukejmann/aws-lc-rs.git", branch = "fix/ios-cross-compilation" }
+
 [profile.release]
 opt-level = 'z' # Optimize for size.
 lto = true      # Enable Link Time Optimization.