Disable LTO in PKGBUILD to fix vendored Lua static link

makepkg's default -flto=auto made mlua's vendored liblua5.4.a contain GCC
LTO bitcode that the Rust (lld) link couldn't read, leaving all lua_*
symbols undefined. options=(!lto) produces a clean static link.
Verified building in a clean archlinux container.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

packaging/arch/PKGBUILD

@@ -7,6 +7,10 @@ pkgdesc="A reactive automation fabric for Linux desktops"
 arch=('x86_64')
 url="https://github.com/Breadway/bread"
 license=('MIT')
+# mlua builds Lua from vendored C source. makepkg's default -flto=auto would
+# emit GCC LTO bitcode into liblua5.4.a, which the Rust (lld) link can't read,
+# leaving all lua_* symbols undefined. Disable LTO for a clean static link.
+options=(!lto)
 depends=('glibc' 'libgit2')
 optdepends=(
   'libnotify: desktop notifications via bread.notify()'