cm: Put install tools in OUT/install

 * This allows us to avoid modifying /system at install time.

Change-Id: I747551d7f38a3eef70ab64f32b6d4a4749c01012
diff --git a/common.mk b/common.mk
index a302a14..12b56b7 100644
--- a/common.mk
+++ b/common.mk
@@ -18,14 +18,14 @@
 
 # Backup Tool
 PRODUCT_COPY_FILES += \
-    vendor/aosp/prebuilt/common/bin/backuptool.sh:system/bin/backuptool.sh \
-    vendor/aosp/prebuilt/common/bin/backuptool.functions:system/bin/backuptool.functions \
+    vendor/aosp/prebuilt/common/bin/backuptool.sh:install/bin/backuptool.sh \
+    vendor/aosp/prebuilt/common/bin/backuptool.functions:install/bin/backuptool.functions \
     vendor/aosp/prebuilt/common/bin/50-base.sh:system/addon.d/50-base.sh \
     vendor/aosp/prebuilt/common/bin/blacklist:system/addon.d/blacklist
 
 # Signature compatibility validation
 PRODUCT_COPY_FILES += \
-    vendor/aosp/prebuilt/common/bin/otasigcheck.sh:system/bin/otasigcheck.sh
+    vendor/aosp/prebuilt/common/bin/otasigcheck.sh:install/bin/otasigcheck.sh
 
 # Bootanimation
 PRODUCT_COPY_FILES += \