please.sh: optionally include ARM64 artifacts

Affects the make_installers_from_mingw_w64_git function. Adds a new
option --include-arm64-artifacts, which allows the user to include
ARM64 artifacts in the generated build. This is necessary until native
ARM64 packages can be built on MSYS2.

Can be invoked as follows, for example:
./please.sh make_installers_from_mingw_w64_git \
    --include-arm64-artifacts=$PWD/arm64 --version=2.30.0 -o artifacts \
    --portable

Signed-off-by: Dennis Ameling <dennis@dennisameling.com>
Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

please.sh

@@ -4770,12 +4770,13 @@ build_mingw_w64_git () { # [--only-32-bit] [--only-64-bit] [--skip-test-artifact
 }
 
 # This function does not "clean up" after installing the packages
-make_installers_from_mingw_w64_git () { # [--pkg=<package>[,<package>...]] [--version=<version>] [--installer] [--portable] [--mingit] [--mingit-busybox] [--nuget] [--nuget-mingit] [--archive]
+make_installers_from_mingw_w64_git () { # [--pkg=<package>[,<package>...]] [--version=<version>] [--installer] [--portable] [--mingit] [--mingit-busybox] [--nuget] [--nuget-mingit] [--archive] [--include-arm64-artifacts=<path>]
 	modes=
 	install_package=
 	output=
 	output_path=
 	version=0-test
+	include_arm64_artifacts=
 	while case "$1" in
 	--pkg=*)
 		install_package="${install_package:+$install_package }$(echo "${1#*=}" | tr , ' ')"
@@ -4820,6 +4821,9 @@ make_installers_from_mingw_w64_git () { # [--pkg=<package>[,<package>...]] [--ve
 		output_path="$(cygpath -am "${1#-?}")"
 		output="--output=$output_path" || exit
 		;;
+	--include-arm64-artifacts=*)
+		include_arm64_artifacts="$1"
+		;;
 	-*) die "Unknown option: %s\n" "$1";;
 	*) break;;
 	esac; do shift; done
@@ -4855,7 +4859,7 @@ make_installers_from_mingw_w64_git () { # [--pkg=<package>[,<package>...]] [--ve
 		test installer != $mode ||
 		extra="${extra:+$extra }--window-title-version=$version"
 
-		sh -x "${this_script_path%/*}/$mode/release.sh" $output $extra $version
+		sh -x "${this_script_path%/*}/$mode/release.sh" $output $extra $include_arm64_artifacts $version
 	done
 }