full_x86-eng: Ensure we copy the PC bios files.

This change ensures that building full_x86-eng will copy the
Bios files to the right location. This is necessary to launch
"emulator-x86" after building the system images.

Before this patch, one had to make the copy manually. Note that
sdk_x86-eng does not need this (the files are actually taken care
of in build/target/product/sdk.mk so will be copied even in case
of the ARM sdk build).

Change-Id: If70adead27c7997694ebc30561005d26a7358c34
diff --git a/target/product/full_x86.mk b/target/product/full_x86.mk
index e33ef14..f23e988 100644
--- a/target/product/full_x86.mk
+++ b/target/product/full_x86.mk
@@ -22,6 +22,11 @@
 $(call inherit-product, $(SRC_TARGET_DIR)/product/full_base.mk)
 $(call inherit-product, $(SRC_TARGET_DIR)/board/generic/device.mk)
 
+# Ensure we package the BIOS files too.
+PRODUCT_PACKAGES += \
+	bios.bin \
+	vgabios-cirrus.bin \
+
 # Overrides
 PRODUCT_NAME := full_x86
 PRODUCT_DEVICE := generic_x86