Use #!/bin/bash and && in qvm-move-to-vm

#!/bin/bash because qvm-move-to-vm sources qvm-copy-to-vm, which has
a bashism (-o pipefail).

&& is safer in case qvm-*copy*-to-vm is ever changed to call 'set +e'.

file-copy-vm/qvm-move-to-vm

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 #
 # The Qubes OS Project, http://www.qubes-os.org
 #
@@ -20,6 +20,5 @@
 #
 #
 
-set -e
-. qvm-copy-to-vm "$@"
+. qvm-copy-to-vm "$@" &&
 rm -rf -- "$@"