Update Mac launcher and libmozglue for Firefox 153.3.0esr

Build the launcher with the macOS 26.5 SDK. AppKit chooses control metrics
based on the main executable's SDK, so with the old 15.5 launcher, native
buttons and menulists used pre-Tahoe metrics with built-in margins while
Mozilla's XUL (built with 26.5) stopped compensating for them on macOS 26+
(bug 1992898), leaving labels cramped and controls indented.

Also add custom libmozglue.dylib (#6056) and set source info in mozconfig,
which official builds require and which Mozilla only detects automatically
from Mercurial checkouts.

app/config.sh

@@ -8,7 +8,7 @@ RUST_VERSION=1.94.0
 
 # URL prefix for custom builds of Firefox components
 custom_components_url="https://download.zotero.org/dev/firefox-components/"
-custom_components_hash_mac=""
+custom_components_hash_mac="6b586ed383a480fed9d9786ad18a6e6d90b140739e5e4491096df291ec887571"
 custom_components_hash_win_x64="db7c9556bd0f9e36120069391ce66cc199ed1ec4e2fdd3b931f71e35b4586d2b"
 custom_components_hash_win_arm64="fd0f44b38a471009ce1cdd926f7f48be43ed773dad350c62383b8a7235da8711"
 custom_components_hash_win32="694944349fdfd91296f272a68ac5d03183f02d47fdaa7ba9f2b1c74747652aa2"

app/mac/mozconfig

@@ -4,7 +4,7 @@ elif [ "$Z_ARCH" == "aarch64" ]; then
         ac_add_options --target=aarch64-apple-darwin
 fi
 ac_add_options --enable-bootstrap
-ac_add_options --with-macos-sdk=$HOME/tmp/MacOSX15.5.sdk
+ac_add_options --with-macos-sdk=$HOME/src/MacOSX26.5.sdk
 
 mk_add_options AUTOCLOBBER=1
 
@@ -24,6 +24,11 @@ export MOZILLA_OFFICIAL=1
 export RELEASE_OR_BETA=1
 MOZ_REQUIRE_SIGNING=
 
+# Official builds require source info, which Mozilla only detects automatically from
+# Mercurial checkouts
+export MOZ_SOURCE_REPO=https://github.com/mozilla-firefox/firefox
+export MOZ_SOURCE_CHANGESET=$(git -C "$topsrcdir" rev-parse HEAD)
+
 ac_add_options --enable-official-branding
 
 # Build updater without MAR signature verification