fix KT-10064 Regression: Error with multiple main functions within a single package

#KT-10064 Fixed

Original commit: aa8f3df9a8

jps/jps-plugin/test/org/jetbrains/kotlin/jps/build/ExperimentalIncrementalJpsTestGenerated.java

@@ -395,6 +395,12 @@ public class ExperimentalIncrementalJpsTestGenerated extends AbstractExperimenta
             doTest(fileName);
         }
 
+        @TestMetadata("mainRedeclaration")
+        public void testMainRedeclaration() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("jps-plugin/testData/incremental/pureKotlin/mainRedeclaration/");
+            doTest(fileName);
+        }
+
         @TestMetadata("moveClass")
         public void testMoveClass() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("jps-plugin/testData/incremental/pureKotlin/moveClass/");

jps/jps-plugin/test/org/jetbrains/kotlin/jps/build/IncrementalJpsTestGenerated.java

@@ -395,6 +395,12 @@ public class IncrementalJpsTestGenerated extends AbstractIncrementalJpsTest {
             doTest(fileName);
         }
 
+        @TestMetadata("mainRedeclaration")
+        public void testMainRedeclaration() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("jps-plugin/testData/incremental/pureKotlin/mainRedeclaration/");
+            doTest(fileName);
+        }
+
         @TestMetadata("moveClass")
         public void testMoveClass() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("jps-plugin/testData/incremental/pureKotlin/moveClass/");

jps/jps-plugin/testData/incremental/pureKotlin/mainRedeclaration/a.kt

@@ -0,0 +1,3 @@
+package foo
+
+fun main(args: Array<String>) = println("a")

jps/jps-plugin/testData/incremental/pureKotlin/mainRedeclaration/a.kt.new

@@ -0,0 +1,3 @@
+package foo
+
+fun main(args: Array<String>) = println("A")

jps/jps-plugin/testData/incremental/pureKotlin/mainRedeclaration/b.kt

@@ -0,0 +1,3 @@
+package foo
+
+fun main(args: Array<String>) = println("b")

jps/jps-plugin/testData/incremental/pureKotlin/mainRedeclaration/build.log

@@ -0,0 +1,7 @@
+Cleaning output files:
+out/production/module/META-INF/module.kotlin_module
+out/production/module/foo/AKt.class
+End of files
+Compiling files:
+src/a.kt
+End of files