Define property to monitor device rotation for channel swap.

Define ro.audio.monitorRotation in makefile used by both flo and deb.

Bug 9265244

Change-Id: I81995642d6361caf9734b8f6febf8e6715fe4283
diff --git a/CleanSpec.mk b/CleanSpec.mk
index 3f7fa88..0b1be02 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -50,3 +50,4 @@
 $(call add-clean-step, rm -rf out/target/product/flo/system/build.prop)
 $(call add-clean-step, rm -rf out/target/product/flo/system/build.prop)
 $(call add-clean-step, rm -rf out/target/product/flo/system/build.prop)
+$(call add-clean-step, rm -f $(PRODUCT_OUT)/system//build.prop)
diff --git a/device-common.mk b/device-common.mk
index e6a318e..fcbfae0 100644
--- a/device-common.mk
+++ b/device-common.mk
@@ -182,6 +182,10 @@
 PRODUCT_COPY_FILES += \
     device/asus/flo/audio_effects.conf:system/vendor/etc/audio_effects.conf
 
+# Monitor device rotation for speaker channel swap
+PRODUCT_PROPERTY_OVERRIDES += \
+	ro.audio.monitorRotation=true
+
 PRODUCT_PACKAGES += \
 	hci_qcomm_init
 
diff --git a/system.prop b/system.prop
index ff272aa..937fbb7 100644
--- a/system.prop
+++ b/system.prop
@@ -3,5 +3,3 @@
 #LTE, GSM, WCDMA(9)
 #
 ro.telephony.default_network=9
-# monitor device rotation for speaker channel swap
-ro.audio.monitorRotation=true