add build script

xwords4/android/scripts/find-and-ant.sh

@@ -0,0 +1,33 @@
+#!/bin/sh
+
+set -e -u
+
+MANIFEST=AndroidManifest.xml
+
+usage() {
+    [ $# -ge 1 ] && echo "ERROR: $1"
+    echo "usage: $0 <cmds to ant>"
+	echo "   default commands: $CMDS"
+    exit 1
+}
+
+CMDS="clean debug install"
+if [ $# -gt 0 ]; then
+    case $1 in
+	--help|-h|-help|-?)
+	    usage
+	    ;;
+	*)
+	    CMDS="$*"
+	    break;
+	    ;;
+    esac
+    shift
+fi
+
+while [ ! -e $MANIFEST ]; do
+    [ '/' = $(pwd) ] && usage "reached root without finding $MANIFEST"
+    cd ..
+done
+
+ant $CMDS