build: use build-locale.sh in all build scripts

contrib/android/make_apk

@@ -25,17 +25,10 @@ popd
 # update locale
 info "preparing electrum-locale."
 (
-    cd "$CONTRIB"/deterministic-build/electrum-locale
-    if ! which msgfmt > /dev/null 2>&1; then
-        fail "Please install gettext"
-    fi
+    LOCALE="$PROJECT_ROOT/electrum/locale/"
     # we want the binary to have only compiled (.mo) locale files; not source (.po) files
-    rm -rf "$PROJECT_ROOT/electrum/locale/"
-    for i in ./locale/*; do
-        dir="$PROJECT_ROOT/electrum/$i/LC_MESSAGES"
-        mkdir -p $dir
-        msgfmt --output-file="$dir/electrum.mo" "$i/electrum.po" || true
-    done
+    rm -rf "$LOCALE"
+    "$CONTRIB/build_locale.sh" "$CONTRIB/deterministic-build/electrum-locale/locale/" "$LOCALE"
 )
 
 pushd "$CONTRIB_ANDROID"