Add module-info.java for standard Kotlin libraries

Using the new multi-release jar feature, store compiled
module-info.class files into META-INF/versions/9 instead of the artifact
root. Hopefully, this will break fewer tools which do not support
module-info.class files because any sane tool should not do anything
with files in META-INF because before Java 9 that directory only
contained resources.

Upgrade some Maven plugins to newer versions which do not fail on
module-info.class files

 #KT-21266 In Progress

libraries/stdlib/jdk8/build.gradle

@@ -29,10 +29,18 @@ sourceSets {
             }
         }
     }
+    java9 {
+        java {
+            srcDirs = ['java9']
+        }
+    }
 }
 
+createCompileJava9Task(project, "compileJava9", "kotlin.stdlib.jdk8")
+
 jar {
-    manifestAttributes(manifest, project, 'Main')
+    manifestAttributes(manifest, project, 'Main', true)
+    from compileJava9.outputs
 }
 
 artifacts {

libraries/stdlib/jdk8/java9/module-info.java

@@ -0,0 +1,7 @@
+module kotlin.stdlib.jdk8 {
+    requires transitive kotlin.stdlib;
+
+    exports kotlin.collections.jdk8;
+    exports kotlin.streams.jdk8;
+    exports kotlin.text.jdk8;
+}