Update Cloud Apt repos to correct location

Change-Id: I14d84f76a8b4eff95014e3945c0a8316f976a2bb

multistrap.conf

diff --git a/multistrap.conf b/multistrap.conf
index 20ed6d4..65b5c54 100644
--- a/multistrap.conf
+++ b/multistrap.conf
@@ -23,10 +23,10 @@
 
 [main_backup]
 packages=MAIN_PACKAGES
-source=https://packages.cloud.google.com/apt/mendel-eagle
-suite=eagle
+source=https://packages.cloud.google.com/apt
+suite=mendel-eagle
 
 [bsp_backup]
 packages=
-source=https://packages.cloud.google.com/apt/mendel-eagle-bsp-enterprise
-suite=eagle
+source=https://packages.cloud.google.com/apt
+suite=mendel-eagle-bsp-enterprise