android: Bump to android-21

Change-Id: Ifbe9a316795fc0519119aa9420152118f3926653
Reviewed-on: https://gerrit.libreoffice.org/14946Reviewed-by: Tomaž Vajngerl <quikee@gmail.com>
Tested-by: Tomaž Vajngerl <quikee@gmail.com>

android/Bootstrap/Makefile.shared

@@ -62,7 +62,7 @@ properties:
 	echo sdk.dir=$(ANDROID_SDK_HOME) >../../Bootstrap/local.properties
 	echo "# File needed by ndk-gdb" >jni/Application.mk
 	echo "APP_ABI := $(ANDROID_APP_ABI)" > jni/Application.mk
-	echo "APP_PLATFORM := android-15" >> jni/Application.mk
+	echo "APP_PLATFORM := android-21" >> jni/Application.mk
 
 install:
 	unset JAVA_HOME && $(ANT) $(if $(VERBOSE)$(verbose),,-quiet) debug install

android/Bootstrap/project.properties

@@ -9,4 +9,4 @@
 
 android.library=true
 # Project target.
-target=android-15
+target=android-21

android/experimental/DocumentLoader/project.properties

@@ -8,7 +8,7 @@
 # project structure.
 
 # Project target.
-target=android-15
+target=android-21
 
 # Use the Bootstrap class
 android.library.reference.1=../../Bootstrap

android/experimental/desktop/project.properties

@@ -8,6 +8,6 @@
 # project structure.
 
 # Project target.
-target=android-15
+target=android-21
 
 android.library.reference.1=../../Bootstrap