Set JAVA_HOME for OS/X. (PR 8503)

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@272594 13f79535-47bb-0310-9956-ffa450edef68

src/script/ant

@@ -26,7 +26,11 @@ cygwin=false;
 darwin=false;
 case "`uname`" in
   CYGWIN*) cygwin=true ;;
-  Darwin*) darwin=true ;;
+  Darwin*) darwin=true
+           if [ -z "$JAVA_HOME" ] ; then
+             JAVA_HOME=/System/Library/Frameworks/JavaVM.framework/Home   
+           fi
+           ;;
 esac
 
 if [ -z "$ANT_HOME" ] ; then
@@ -145,7 +149,6 @@ if [ -n "$JAVA_HOME" ] ; then
       done
     fi
   fi
-
 else
   echo "Warning: JAVA_HOME environment variable is not set."
   echo "  If build fails because sun.* classes could not be found"