Add sound_trigger.primary.flounder to flounder device.mk

This is needed for sound trigger APIs

Change-Id: I9274551190721dba1bc5a475dc6b7e23b6edbdcc
diff --git a/device.mk b/device.mk
index 1b2d705..439508c 100644
--- a/device.mk
+++ b/device.mk
@@ -206,6 +206,10 @@
     audio.r_submix.default \
     libhtcacoustic
 
+# for sound trigger on DSP
+PRODUCT_PACKAGES += \
+    sound_trigger.primary.flounder
+
 # Allows healthd to boot directly from charger mode rather than initiating a reboot.
 PRODUCT_DEFAULT_PROPERTY_OVERRIDES += \
     ro.enable_boot_charger_mode=1