gui: bump theme version to 2

Commit 9472ba1d introduced new behavior for KEY_POWER which
needs a corresponding change in the theme to call the
setbacklight action whenever the power button is pressed.

Change-Id: Iacd46436b04aba1ecb1adbb684c56c3ef994bfe0
diff --git a/gui/theme/landscape_hdpi/splash.xml b/gui/theme/landscape_hdpi/splash.xml
index 6616038..8da2fe6 100644
--- a/gui/theme/landscape_hdpi/splash.xml
+++ b/gui/theme/landscape_hdpi/splash.xml
@@ -5,7 +5,7 @@
 		<author>TeamWin</author>
 		<title>TWRP</title>
 		<description>splash screen</description>
-		<themeversion>1</themeversion>
+		<themeversion>2</themeversion>
 	</details>
 
 	<resources>