jme3-android-examples: fix incorrect dependency

.gitignore: add jme3-android-examples/build folder

.gitignore

@@ -10,6 +10,7 @@
 /jme3-desktop/build/
 /jme3-android-native/build/
 /jme3-android/build/
+/jme3-android-examples/build/
 /jme3-blender/build/
 /jme3-effects/build/
 /jme3-bullet/build/

jme3-android-examples/build.gradle

@@ -3,7 +3,7 @@ dependencies {
     compile project(':jme3-android')
     compile project(':jme3-effects')
     compile project(':jme3-bullet')
-    compile project(':jme3-bullet-native')
+    compile project(':jme3-bullet-native-android')
     compile project(':jme3-networking')
     compile project(':jme3-niftygui')
     compile project(':jme3-plugins')