backuptool: Disregard known bad backup scripts

Keep a blacklist of md5 sums for scripts known to cause issues, and
ignore them when installing new builds

Change-Id: I19a88b58194a32da5eb5fe278f2c5b9a145b57be
diff --git a/config/common.mk b/config/common.mk
index 7689760..b776cd8 100644
--- a/config/common.mk
+++ b/config/common.mk
@@ -74,7 +74,8 @@
 PRODUCT_COPY_FILES += \
     vendor/cm/prebuilt/common/bin/backuptool.sh:system/bin/backuptool.sh \
     vendor/cm/prebuilt/common/bin/backuptool.functions:system/bin/backuptool.functions \
-    vendor/cm/prebuilt/common/bin/50-cm.sh:system/addon.d/50-cm.sh
+    vendor/cm/prebuilt/common/bin/50-cm.sh:system/addon.d/50-cm.sh \
+    vendor/cm/prebuilt/common/bin/blacklist:system/addon.d/blacklist
 
 # init.d support
 PRODUCT_COPY_FILES += \