fix(remount): correct usrLibMultiarchDir value for 32-bit ARM (#259)

Co-authored-by: Cian Johnston <[email protected]>

Author: maxbrunet

internal/ebutil/libs_arm.go

@@ -2,5 +2,6 @@
 
 package ebutil
 
-// Based on a 32-bit Raspbian system.
-const usrLibMultiarchDir = "/usr/lib/arm-linux-gnueabihf"
+// This constant is for 64-bit systems. 32-bit ARM is not supported.
+// If ever it becomes supported, it should be handled with a `usrLib32MultiarchDir` constant.
+const usrLibMultiarchDir = "/var/empty"

internal/ebutil/remount_internal_test.go

@@ -18,6 +18,7 @@ import (
 
 var expectedLibMultiarchDir = map[string]string{
 	"amd64": "/usr/lib/x86_64-linux-gnu",
+	"arm":   "/var/empty",
 	"arm64": "/usr/lib/aarch64-linux-gnu",
 }