Added missing ignore gitignore mentions for AWS packages

Signed-off-by: Chris Galvan <[email protected]>

package-system/.gitignore

@@ -1,6 +1,8 @@
 assimp-*
 astc-encoder-*
+AWSGameLiftServerSDK-*
 AwsIotDeviceSdkCpp-*
+AWSNativeSDK-*
 azslc-*
 Blast-*
 Crashpad-*