UseJava: add INCLUDE_MODULES argument to add_jar

Arguments are added to the dependencies list, and to the "--module-path"
passed to javac, which is only generated for adequate JDK versions.

Tests/JavaModExportImport/InstallExport/Bar.java

@@ -0,0 +1,13 @@
+package com.bar;
+
+public class Bar
+{
+  public Bar()
+  {
+  }
+
+  public void printName()
+  {
+    System.out.println("Bar");
+  }
+}

Tests/JavaModExportImport/InstallExport/CMakeLists.txt

@@ -0,0 +1,15 @@
+project(bar Java)
+
+cmake_minimum_required(VERSION 3.10)
+set(CMAKE_VERBOSE_MAKEFILE 1)
+
+find_package(Java COMPONENTS Development)
+include(UseJava)
+
+add_jar(${PROJECT_NAME} Bar.java module-info.java)
+install_jar(${PROJECT_NAME} DESTINATION share/java)
+install_jar_exports(
+  TARGETS ${PROJECT_NAME}
+  NAMESPACE bar::
+  FILE JavaInstallExportTestConfig.cmake
+  DESTINATION share/cmake)

Tests/JavaModExportImport/InstallExport/module-info.java

@@ -0,0 +1,3 @@
+module mod_bar {
+    exports com.bar;
+}