Fix makefile error

We changed the filename, but not the PRODUCT_COPY_FILES directive

oops

Change-Id: Id642a2e39d9bc3b131f09cf9710d05e29d239382
diff --git a/config/common.mk b/config/common.mk
index a2b2f10..56ade07 100644
--- a/config/common.mk
+++ b/config/common.mk
@@ -24,7 +24,7 @@
 PRODUCT_COPY_FILES += \
     vendor/custom/prebuilt/bin/backuptool.sh:system/bin/backuptool.sh \
     vendor/custom/prebuilt/bin/backuptool.functions:system/bin/backuptool.functions \
-    vendor/custom/prebuilt/bin/50-example.sh:system/addon.d/50-example.sh \
+    vendor/custom/prebuilt/bin/50-hosts.sh:system/addon.d/50-hosts.sh \
     vendor/custom/prebuilt/bin/blacklist:system/addon.d/blacklist
 
 # init.d support