Ignore pre-build android validation layers [skip ci]

.gitignore

@@ -204,4 +204,7 @@ vulkanCapsViewer/vulkanreport.json
 !data/models/voyager/*.obj
 
 # DLLs in bin
-!bin/*.dll
+!bin/*.dll
+
+# Android validation layer libraries
+android/layers/*/*.so

android/layers/README.md

@@ -0,0 +1,9 @@
+# Android validation layers
+
+Put the pre-built validation layers into the folder for the architecture you're targeting.
+
+E.g. for armeabi-v7a:
+
+./armeabi-v7a/libVkLayer_core_validation.so
+./armeabi-v7a/libVkLayer_object_tracker.so
+...