Android: Install gradle templates

Install the required gradle templates for the android deployment tool
to work correctly.

Change-Id: I1b18235c354dbea2d4b47ce1d8146a477676a6cb
Reviewed-by: Qt CMake Build Bot
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

src/3rdparty/CMakeLists.txt

@@ -1,3 +1,9 @@
 add_subdirectory(tinycbor)
 add_subdirectory(harfbuzz)
 add_subdirectory(double-conversion)
+
+#special case begin
+if (ANDROID)
+    add_subdirectory(gradle)
+endif()
+#special case end

src/3rdparty/gradle/CMakeLists.txt

@@ -0,0 +1,20 @@
+# special case begin
+
+install(
+    FILES
+        gradlew
+        gradlew.bat
+    DESTINATION
+        src/3rdparty/gradle
+    COMPONENT
+        Devel)
+
+install(
+    DIRECTORY
+        gradle
+    DESTINATION
+        src/3rdparty/gradle
+    COMPONENT
+        Devel)
+
+# special case end