Added a test for JAXP extensions to jdk.  If they aren't found, we don't build VjControl.  VjControl will be requiring JAXP for processing of XML files once the xml branch is merged back into head.
Added a test for JAXP extensions to jdk.  If they aren't found, we don't
build VjControl.  VjControl will be requiring JAXP for processing of XML
files once the xml branch is merged back into head.

JAXP can be available 3 ways:
- by using JDK 1.4 or higher.
- by using JDK 1.2 or 1.3, and placing the jar files in Sun's JAXP
  reference implementation in $JDK_HOME/jre/lib/ext
- by using JDK 1.2 or 1.3 and placing the jar files in Sun's JAXP
  in your CLASSPATH, like so:
     setenv CLASSPATH path/jaxp.jar:path/crimson.jar

Note to vrac jugglers: the two necessary jar files are in ~cjust/public/java
I'll ask Glenn to install the files so that we won't have to worry about
CLASSPATH.


git-svn-id: 769d22dfa2d22aad706b9a451492fb87c0735f19@5860 08b38cba-cd3b-11de-854e-f91c5b6e4272

godbyk/vrjuggler-upstream-old,LiuKeHua/vrjuggler,MichaelMcDonnell/vrjuggler,vancegroup-mirrors/vrjuggler,MichaelMcDonnell/vrjuggler,vrjuggler/vrjuggler,vrjuggler/vrjuggler,vancegroup-mirrors/vrjuggler,LiuKeHua/vrjuggler,vrjuggler/vrjuggler,godbyk/vrjuggler-upstream-old,MichaelMcDonnell/vrjuggler,MichaelMcDonnell/vrjuggler,MichaelMcDonnell/vrjuggler,MichaelMcDonnell/vrjuggler,vrjuggler/vrjuggler,vancegroup-mirrors/vrjuggler,MichaelMcDonnell/vrjuggler,LiuKeHua/vrjuggler,vancegroup-mirrors/vrjuggler,LiuKeHua/vrjuggler,LiuKeHua/vrjuggler,vrjuggler/vrjuggler,godbyk/vrjuggler-upstream-old,vrjuggler/vrjuggler,godbyk/vrjuggler-upstream-old,godbyk/vrjuggler-upstream-old,godbyk/vrjuggler-upstream-old,LiuKeHua/vrjuggler,vrjuggler/vrjuggler,vrjuggler/vrjuggler,MichaelMcDonnell/vrjuggler,vancegroup-mirrors/vrjuggler,vancegroup-mirrors/vrjuggler,LiuKeHua/vrjuggler,LiuKeHua/vrjuggler