android: Dump my debugging notes to the readme's.

Change-Id: I8f91e73fe5df5dfef054df80d43be3c74d01388b

README.Android

@@ -46,6 +46,11 @@ know. But don't seem to be necessary on a real device anyway?
 
 * Debugging
 
+	Install the .apk to the device, start the application, and:
+
+	cd android/experimental/LOAndroid3
+	<android-ndk-r9d>/ndk-gdb --adb=<android-sdk-linux>/platform-tools/adb
+
 	Some versions of the NDK had a broken gdb in the way that it can see
 symbols only for shlibs that were already loaded when the debuggee was
 attached, so you need to carefully guess where to put:

README.cross

@@ -375,6 +375,19 @@ an "adb logcat" running in another window.
 To debug, do manually what "make run" would do and when the app has
 started, run ndk-gdb.
 
+You can also do that manually; to install:
+
+  <android-sdk-linux>/platform-tools/adb install -r android/experimental/LOAndroid3/bin/LibreOfficeViewer-debug.apk
+
+To see the log:
+
+  <android-sdk-linux>/platform-tools/adb logcat
+
+To debug, install the .apk, run it, and then:
+
+  cd android/experimental/LOAndroid3
+  <android-ndk-r9d>/ndk-gdb --adb=<android-sdk-linux>/platform-tools/adb
+
 NB: If you happen to upgrade to Android SDK Tools 23, and the build (using
 'make verbose=t android') fails for you with: