Load automatic module names correctly

Load the Automatic-Module-Name manifest entry value if it's present (see
http://mail.openjdk.java.net/pipermail/jpms-spec-observers/2017-May/000877.html),
otherwise sanitize the name of the .jar file, throwing out all chars
except alphanumeric, duplicate dots and a version qualifier

compiler/testData/javaModules/automaticModuleNames/main/usage.kt

@@ -0,0 +1,6 @@
+import m1.A
+import m2.B
+
+fun usage(): String {
+    return "${A()}${B()}"
+}