boost: fix arm64 build

Patch Boost build system, so that it does inject '-arch arm64' instead
of '-arch arm'. This patch is already applied upstream.

Closes #59257.

Signed-off-by: Claudia Pellegrino <1239874+claui@users.noreply.github.com>
Signed-off-by: BrewTestBot <1589480+BrewTestBot@users.noreply.github.com>

Formula/boost.rb

@@ -31,6 +31,13 @@ class Boost < Formula
     directory "tools/build"
   end
 
+  # Fix build on 64-bit arm
+  patch do
+    url "https://github.com/boostorg/build/commit/456be0b7ecca065fbccf380c2f51e0985e608ba0.patch?full_index=1"
+    sha256 "e7a78145452fc145ea5d6e5f61e72df7dcab3a6eebb2cade6b4cfae815687f3a"
+    directory "tools/build"
+  end
+
   def install
     # Force boost to compile with the desired compiler
     open("user-config.jam", "a") do |file|