bug#26341: [PATCH 2/2] build: vm: Add missing module.

[Mathieu Othacehe <m.othacehe@gmail.com>]

* gnu/build/vm.scm (define-module): Use module (guix build syscalls).

It fixes the following warnings during guix build :

gnu/build/vm.scm:233:3: warning: possibly unbound variable `mount'
gnu/build/vm.scm:238:3: warning: possibly unbound variable `umount'
gnu/build/vm.scm:268:8: warning: possibly unbound variable `mount'
gnu/build/vm.scm:276:8: warning: possibly unbound variable `umount'
gnu/build/vm.scm:315:4: warning: possibly unbound variable `mount'
gnu/build/vm.scm:323:4: warning: possibly unbound variable `umount'

This was not possible until commit f05346979 because we had to be sure
that Guile core implementation of 'mount' and 'umount' was used in
initrd context.
---
 gnu/build/vm.scm | 1 +
 1 file changed, 1 insertion(+)

diff --git a/gnu/build/vm.scm b/gnu/build/vm.scm
index 60ee18ebe..44a3000eb 100644
--- a/gnu/build/vm.scm
+++ b/gnu/build/vm.scm
@@ -21,6 +21,7 @@
 (define-module (gnu build vm)
   #:use-module (guix build utils)
   #:use-module (guix build store-copy)
+  #:use-module (guix build syscalls)
   #:use-module (gnu build linux-boot)
   #:use-module (gnu build install)
   #:use-module (guix records)
-- 
2.12.2