Add missing fbjni deps

Summary:
fbjni was previously dependency-free but now requires some annotations and
soloader. This unbreaks the gradle build.

Reviewed By: emilsjolander

Differential Revision: D5020069

fbshipit-source-id: b8bde83ce6a70b06e04491f1d70c2a6b568bc99c

lib/fb/build.gradle

@@ -24,4 +24,10 @@ android {
             path 'src/main/cpp/CMakeLists.txt'
         }
     }
+
+    dependencies {
+        compile 'com.facebook.soloader:soloader:0.2.0'
+        compile 'com.google.code.findbugs:jsr305:3.0.1'
+        compile project(':yoga:proguard-annotations')
+    }
 }