Add verbose mode to build reports

#KT-12700

Verbose mode can be enabled by adding `kotlin.build.report.verbose=true`
to `gradle.properties` file.

compiler/incremental-compilation-impl/src/org/jetbrains/kotlin/incremental/IncrementalCompilerRunner.kt

@@ -144,10 +144,6 @@ abstract class IncrementalCompilerRunner<
 
         if (dirtySourcesSinceLastTimeFile.exists()) {
             val files = dirtySourcesSinceLastTimeFile.readLines().map(::File)
-            if (files.isNotEmpty()) {
-                reporter.reportVerbose { "Source files added since last compilation: ${reporter.pathsAsString(files)}" }
-            }
-
             dirtyFiles.add(files, "was not compiled last time")
         }
     }

compiler/incremental-compilation-impl/src/org/jetbrains/kotlin/incremental/IncrementalJvmCompilerRunner.kt

@@ -32,7 +32,6 @@ import org.jetbrains.kotlin.cli.common.messages.MessageCollector
 import org.jetbrains.kotlin.cli.jvm.K2JVMCompiler
 import org.jetbrains.kotlin.cli.jvm.compiler.EnvironmentConfigFiles
 import org.jetbrains.kotlin.cli.jvm.compiler.KotlinCoreEnvironment
-import org.jetbrains.kotlin.compilerRunner.ArgumentUtils
 import org.jetbrains.kotlin.config.CompilerConfiguration
 import org.jetbrains.kotlin.config.IncrementalCompilation
 import org.jetbrains.kotlin.config.Services
@@ -79,7 +78,10 @@ fun makeIncrementally(
     }
 }
 
-object EmptyICReporter : ICReporter {
+object EmptyICReporter : ICReporterBase() {
+    override fun reportCompileIteration(incremental: Boolean, sourceFiles: Collection<File>, exitCode: ExitCode) {
+    }
+
     override fun report(message: () -> String) {
     }
 

compiler/incremental-compilation-impl/test/org/jetbrains/kotlin/incremental/utils/TestICReporter.kt

@@ -17,10 +17,10 @@
 package org.jetbrains.kotlin.incremental.utils
 
 import org.jetbrains.kotlin.cli.common.ExitCode
-import org.jetbrains.kotlin.incremental.ICReporter
+import org.jetbrains.kotlin.incremental.ICReporterBase
 import java.io.File
 
-class TestICReporter : ICReporter {
+class TestICReporter : ICReporterBase() {
     private val compiledSourcesMutable = arrayListOf<File>()
 
     val compiledSources: List<File>