audio: Compilation fix for kernel include

-In Android.mk Kernel include directory is protected
 under feature flags. Calibration header requires kernel
 include directory

Change-Id: If24c99723ba6e3d8b0da30a5e44cf49dad042c2a
diff --git a/hal/Android.mk b/hal/Android.mk
index 22c01c1..6cb7c47 100644
--- a/hal/Android.mk
+++ b/hal/Android.mk
@@ -137,7 +137,8 @@
 	$(call include-path-for, audio-effects) \
 	$(LOCAL_PATH)/$(AUDIO_PLATFORM) \
 	$(LOCAL_PATH)/audio_extn \
-	$(LOCAL_PATH)/voice_extn
+	$(LOCAL_PATH)/voice_extn \
+        $(TARGET_OUT_INTERMEDIATES)/KERNEL_OBJ/usr/include
 
 ifneq ($(filter msm8974,$(AUDIO_PLATFORM)),)
     LOCAL_C_INCLUDES += external/expat/lib