Introduce TestingContext to pass data between tests and KotlinBuilder; introduce BuildLogger to log build events (build finished, files marked as dirty) in KotlinBuilder

jps-plugin/testData/incremental/classHierarchyAffected/overrideImplicit/build.log

@@ -1,23 +1,36 @@
+================ Step #1 =================
+
 Cleaning output files:
-out/production/module/B.class
+  out/production/module/B.class
 End of files
 Compiling files:
-src/B.kt
+  src/B.kt
 End of files
+Marked as dirty by Kotlin:
+  src/BA.kt
+Exit code: ADDITIONAL_PASS_REQUIRED
+------------------------------------------
 Cleaning output files:
-out/production/module/BA.class
+  out/production/module/BA.class
 End of files
 Compiling files:
-src/BA.kt
+  src/BA.kt
 End of files
+Exit code: ABORT
+------------------------------------------
 COMPILATION FAILED
 Class 'BA' must be declared abstract or implement abstract member public abstract fun f(c: C<kotlin.Any>): kotlin.Unit defined in A
 
+================ Step #2 =================
 
 Cleaning output files:
-out/production/module/B.class
+  out/production/module/B.class
 End of files
 Compiling files:
-src/B.kt
-src/BA.kt
-End of files
+  src/B.kt
+  src/BA.kt
+End of files
+Exit code: ADDITIONAL_PASS_REQUIRED
+------------------------------------------
+Exit code: NOTHING_DONE
+------------------------------------------