Merge pull request #359 from ACRA/buildconfig

Looking for BuildConfig class in the package defined in AndroidManifet, not the package of the Application class.

src/main/java/org/acra/collector/CrashReportDataFactory.java

@@ -571,7 +571,7 @@ private Class<?> getBuildConfigClass() throws ClassNotFoundException {
             return configuredBuildConfig;
         }
 
-        final String className = context.getClass().getPackage().getName() + ".BuildConfig";
+        final String className = context.getPackageName() + ".BuildConfig";
         try {
             return Class.forName(className);
         } catch (ClassNotFoundException e) {