Restores the passing of scalac.args and javac.args from

ant to partest for use on all tests, which rytz had
astutely pointed out I made disappear.  Long term I think one
ought to be able to specify different arguments for building
the compiler and for partest, but now is not the moment for
such grand ambition.  No review.

git-svn-id: http://lampsvn.epfl.ch/svn-repos/scala/scala/trunk@21439 5e8d7ff9-d8ef-0310-90f0-a4852d11357a

build.xml

@@ -1510,6 +1510,8 @@ BOOTRAPING TEST AND TEST SUITE
 	<partest classpathref="pack.classpath">
 	  <env key="PATH" path="${build-pack.dir}/bin:${env.PATH}" />
 	  <sysproperty key="partest.srcdir" value="files" />
+	  <sysproperty key="partest.scalacopts" value="${scalac.args.all}" />
+	  <sysproperty key="partest.javacopts" value="${javac.args}" />
 	  <syspropertyset>
 		<propertyref prefix="partest"/>
 	  </syspropertyset>