support/misc/Vagrantfile: support libvirt provider

And configure memory/CPU like for the other providers.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
(cherry picked from commit 75b543880ceaeb8ff039b0cf3a2ba3e1d38aba37)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

support/misc/Vagrantfile

@@ -29,6 +29,11 @@ Vagrant.configure('2') do |config|
 		end
 	end
 
+	config.vm.provider :libvirt do |v, override|
+		v.memory = VM_MEMORY
+		v.cpus = VM_CORES
+	end
+
 	config.vm.provision 'shell' do |s|
 		s.inline = 'echo Setting up machine name'