Pack runtime sources to separate jar

build.xml

@@ -498,8 +498,6 @@
         <jar destfile="${kotlin-home}/lib/kotlin-runtime.jar">
             <fileset dir="${output}/classes/runtime"/>
             <fileset dir="${output}/classes/stdlib"/>
-            <fileset dir="${basedir}/runtime" includes="src/**/*"/>
-            <fileset dir="${basedir}/libraries/stdlib" includes="src/**/*"/>
             <zipfileset file="${kotlin-home}/build.txt" prefix="META-INF"/>
 
             <manifest>
@@ -512,6 +510,22 @@
         </jar>
     </target>
 
+    <target name="runtime_sources">
+        <jar destfile="${kotlin-home}/lib/kotlin-runtime-sources.jar">
+            <fileset dir="${basedir}/runtime/src" includes="**/*"/>
+            <fileset dir="${basedir}/libraries/stdlib/src" includes="**/*"/>
+            <zipfileset file="${kotlin-home}/build.txt" prefix="META-INF"/>
+
+            <manifest>
+                <attribute name="Built-By" value="JetBrains"/>
+
+                <attribute name="Implementation-Vendor" value="JetBrains"/>
+                <attribute name="Implementation-Title" value="Kotlin Compiler Runtime + StdLib Sources"/>
+                <attribute name="Implementation-Version" value="${build.number}"/>
+            </manifest>
+        </jar>
+    </target>
+
     <target name="j2kConverter">
         <taskdef resource="net/sf/antcontrib/antcontrib.properties" classpath="${basedir}/dependencies/ant-contrib.jar"/>
 
@@ -539,11 +553,11 @@
 
     <!-- builds redistributables from sources -->
     <target name="dist"
-            depends="clean,init,prepareDist,preloader,compiler,compilerSources,antTools,jdkAnnotations,androidSdkAnnotations,annotationsExt,runtime,jslib,j2kConverter"/>
+            depends="clean,init,prepareDist,preloader,compiler,compilerSources,antTools,jdkAnnotations,androidSdkAnnotations,annotationsExt,runtime,runtime_sources,jslib,j2kConverter"/>
 
     <!-- builds everything, but classes are reused from project out dir, doesn't run proguard and javadoc -->
     <target name="dist_quick"
-            depends="clean,init,prepareDist,preloader,compiler_quick,antTools,jdkAnnotations,androidSdkAnnotations,annotationsExt,runtime,jslib,j2kConverter"/>
+            depends="clean,init,prepareDist,preloader,compiler_quick,antTools,jdkAnnotations,androidSdkAnnotations,annotationsExt,runtime,runtime_sources,jslib,j2kConverter"/>
 
     <!-- builds compiler jar from project out dir -->
     <target name="dist_quick_compiler_only"