Kapt: Analyze sources again if the received analysis result is 'RetryWithAdditionalJavaRoots'. ->

Add additional Java roots to Java source roots and clear diagnostic messages before the next analysis round.
(cherry picked from commit 17ad807)

Original commit: 84d62f37eb

jps/jps-plugin/src/org/jetbrains/kotlin/jps/build/KotlinBuilder.kt

@@ -707,6 +707,10 @@ class KotlinBuilder : ModuleLevelBuilder(BuilderCategory.SOURCE_PROCESSOR) {
             ))
         }
 
+        override fun clear() {
+            hasErrors = false
+        }
+
         override fun hasErrors(): Boolean = hasErrors
 
         private fun renderLocationIfNeeded(location: CompilerMessageLocation): String {