post_proc: add PBE effect for speaker

Enable PBE for speaker device

Change-Id: I1a48dff038baf63376f1d4b355888159cf69ba81
diff --git a/msm8909/post_proc/Android.mk b/msm8909/post_proc/Android.mk
index 9d14c49..50f33e9 100644
--- a/msm8909/post_proc/Android.mk
+++ b/msm8909/post_proc/Android.mk
@@ -20,7 +20,8 @@
 LOCAL_SHARED_LIBRARIES := \
 	libcutils \
 	liblog \
-	libtinyalsa
+	libtinyalsa \
+	libdl
 
 LOCAL_MODULE_TAGS := optional