look for openjdk6 in OpenBSD if v7 isn't available

core/c/find-java-home

@@ -17,6 +17,8 @@ elif [ $UNIXTYPE = "sunos" ]; then
 elif [ $UNIXTYPE = "openbsd" ]; then
     if [ -d /usr/local/jdk-1.7.0 ]; then
         JAVA_HOME="/usr/local/jdk-1.7.0"
+    elif [ -d /usr/local/jdk-1.6.0 ]; then
+        JAVA_HOME="/usr/local/jdk-1.6.0"
     fi
 elif [ $UNIXTYPE = "netbsd" ]; then
     if [ -d /usr/pkg/java/openjdk7 ]; then