Bump build number

Author: teolemon

app/build.gradle

@@ -25,8 +25,8 @@ android {
         applicationId "openfoodfacts.github.scrachx.openfood"
         minSdkVersion 16
         targetSdkVersion 27
-        versionCode 316
-        versionName "3.1.6"
+        versionCode 317
+        versionName "3.1.7"
         testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
         vectorDrawables.useSupportLibrary = true
     }