emulator: Include the ranchu sensors library

Include the HAL library support for the ranchu sensors emulation
provided for display rotation support on the virtual ranchu emulator
board.

Change-Id: Ibb5e1821d5f8ec9299523332352c2f0938fad687
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
diff --git a/target/product/emulator.mk b/target/product/emulator.mk
index 295dfac..3a8a4aa 100644
--- a/target/product/emulator.mk
+++ b/target/product/emulator.mk
@@ -44,7 +44,8 @@
     e2fsck \
     audio.primary.goldfish \
     vibrator.goldfish \
-    power.goldfish
+    power.goldfish \
+    sensors.ranchu
 
 
 PRODUCT_COPY_FILES += \