Add kvm=1 to linux_fuchsia drones

ci/builders/linux_fuchsia.json

diff --git a/ci/builders/linux_fuchsia.json b/ci/builders/linux_fuchsia.json
index 3fe0505..f386e98 100644
--- a/ci/builders/linux_fuchsia.json
+++ b/ci/builders/linux_fuchsia.json
@@ -138,6 +138,7 @@
         {
             "drone_dimensions": [
                 "device_type=none",
+                "kvm=1",
                 "os=Linux"
             ],
             "gclient_variables": {