Fix ADB, and a typo in BoardConfig.mk

Added an instruction to copy init.vbox_x86.rc to the output's root.
This is required to properly setup networking and other stuff inside
the emulator.

Change-Id: I84b11b048120a59109aa95d4f18d496a3c874911
diff --git a/target/board/vbox_x86/device.mk b/target/board/vbox_x86/device.mk
index 95f4be3..a028b98 100644
--- a/target/board/vbox_x86/device.mk
+++ b/target/board/vbox_x86/device.mk
@@ -29,4 +29,5 @@
     development/data/etc/apns-conf.xml:system/etc/apns-conf.xml \
     development/data/etc/vold.conf:system/etc/vold.conf \
     build/target/board/vbox_x86/init.rc:root/init.rc \
+    build/target/board/vbox_x86/init.vbox_x86.rc:root/init.vbox_x86.rc \
     $(LOCAL_KERNEL):kernel