Extract descriptor.loader.java module from frontend.java

Will be used in runtime to load reflected classes

build.xml

@@ -25,6 +25,7 @@
     <dirset id="compilerSources.dirset" dir="${basedir}/">
         <include name="compiler/frontend/src"/>
         <include name="compiler/frontend/serialization/src"/>
+        <include name="core/descriptor.loader.java/src"/>
         <include name="compiler/frontend.java/src"/>
         <include name="compiler/frontend.java/serialization.java/src"/>
         <include name="compiler/backend/src"/>
@@ -43,6 +44,7 @@
     <patternset id="compilerClassesFromIDEA.fileset">
         <include name="frontend/**"/>
         <include name="serialization/**"/>
+        <include name="descriptor.loader.java/**"/>
         <include name="frontend.java/**"/>
         <include name="backend/**"/>
         <include name="cli/**"/>
@@ -127,6 +129,7 @@
         <jar jarfile="${output}/kotlin-compiler-sources.jar">
             <!-- TODO How to convert it from pathset or dirset ? -->
             <fileset dir="compiler/frontend/src"/>
+            <fileset dir="core/descriptor.loader.java/src"/>
             <fileset dir="compiler/frontend.java/src"/>
             <fileset dir="compiler/backend/src"/>
             <fileset dir="compiler/cli/src"/>