Update KotlinCompileMojoBase.java

kotlin-maven-plugin: Simplify log message when there are no sources to compile

This new message is now identical to the Java compiler plugins message for the same scenario.

(cherry picked from commit 0fc5086d1118669a48e57ed70174c630bafbf9c4)

libraries/tools/kotlin-maven-plugin/src/main/java/org/jetbrains/kotlin/maven/KotlinCompileMojoBase.java

@@ -203,7 +203,7 @@ public abstract class KotlinCompileMojoBase<A extends CommonCompilerArguments> e
                 " (JRE " + System.getProperty("java.runtime.version") + ")");
 
         if (!hasKotlinFilesInSources()) {
-            getLog().info("No sources found skipping Kotlin compile");
+            getLog().info("No sources to compile");
             return;
         }