Emscripten: fixed linking with freetype library

os/emscripten/deploy-webapp.sh

@@ -1,6 +1,7 @@
 #!/bin/sh
 
 INSTALL_PATH=`pwd`/../../../openttd-touch-webapp
+MESSAGE="`git log --format=%B -n 1 HEAD`"
 
 export NO_CLEAN=1
 
@@ -8,4 +9,4 @@ export NO_CLEAN=1
 
 cd $INSTALL_PATH || exit 1
 
-git commit -a && git push
+git commit -a -m "$MESSAGE" && git push