Enabling the use of 'compilerarg' with 'scalacf...

Enabling the use of 'compilerarg' with 'scalacfork' task in the build
process.

'compilerarg' was added in r26030 and pushed into starr with r26055. No
review.

build.xml

@@ -634,15 +634,13 @@ QUICK BUILD (QUICK)
     <scalacfork
       destdir="${build-quick.dir}/classes/library"
       compilerpathref="locker.classpath"
-      params="${scalac.args.quick} -Xpluginsdir ${build-quick.dir}/misc/scala-devel/plugins -Xplugin-require:continuations -P:continuations:enable"
+      params="${scalac.args.quick} -Xplugin-require:continuations -P:continuations:enable"
       srcdir="${src.dir}/continuations/library"
       jvmargs="${scalacfork.jvmargs}">
       <include name="**/*.scala"/>
       <compilationpath refid="quick.compilation.path"/>
-	  <!-- TODO: Enable this and remove from params above when "compilerarg" is in starr
       <compilerarg value="-Xpluginsdir"/>
       <compilerarg file="${build-quick.dir}/misc/scala-devel/plugins"/>
-	  -->
     </scalacfork>
     <touch file="${build-quick.dir}/plugins.complete" verbose="no"/>
     <stopwatch name="quick.plugins.timer" action="total"/>
@@ -1151,15 +1149,13 @@ BOOTSTRAPPING BUILD (STRAP)
     <scalacfork
       destdir="${build-strap.dir}/classes/library"
       compilerpathref="pack.classpath"
-      params="${scalac.args.all} -Xpluginsdir ${build-strap.dir}/misc/scala-devel/plugins -Xplugin-require:continuations -P:continuations:enable"
+      params="${scalac.args.all} -Xplugin-require:continuations -P:continuations:enable"
       srcdir="${src.dir}/continuations/library"
       jvmargs="${scalacfork.jvmargs}">
       <include name="**/*.scala"/>
       <compilationpath refid="strap.compilation.path"/>
-	  <!-- TODO: Enable this and remove from params above when "compilerarg" is in starr
       <compilerarg value="-Xpluginsdir"/>
       <compilerarg file="${build-strap.dir}/misc/scala-devel/plugins"/>
-	  -->
     </scalacfork>
     <touch file="${build-strap.dir}/plugins.complete" verbose="no"/>
     <stopwatch name="strap.plugins.timer" action="total"/>