Fix missing rename of all_keys -> all_plat_keys

Bug: 130111713
Test: treehugger
Change-Id: I38f7bd45bb2ec9cfef35384b23811cf6ec15cac2
diff --git a/mac_permissions.mk b/mac_permissions.mk
index 889795c..5f472a1 100644
--- a/mac_permissions.mk
+++ b/mac_permissions.mk
@@ -18,7 +18,7 @@
 
 # Should be synced with keys.conf.
 all_plat_keys := platform media shared testkey
-all_plat_keys := $(all_keys:%=$(dir $(DEFAULT_SYSTEM_DEV_CERTIFICATE))/%.x509.pem)
+all_plat_keys := $(all_plat_keys:%=$(dir $(DEFAULT_SYSTEM_DEV_CERTIFICATE))/%.x509.pem)
 
 $(LOCAL_BUILT_MODULE): PRIVATE_MAC_PERMS_FILES := $(all_plat_mac_perms_files)
 $(LOCAL_BUILT_MODULE): $(plat_mac_perms_keys.tmp) $(HOST_OUT_EXECUTABLES)/insertkeys.py \