Merge ~alfonsosanchezbeato/network-manager:ignore-artefacts into network-manager:snap-1.10

[Alfonso Sanchez-Beato]

gitignore: ignore snaps and folder created by run-tests.sh

gitignore: ignore snaps and folder created by run-tests.sh

[Alfonso Sanchez-Beato (alfonsosanchezbeato)]

Using this small change to test auto-merge in CI.

[System Enablement Bot (system-enablement-ci-bot)]

PASSED: Continuous integration, rev:339dc41c84224f51e3549f1357a53bcade494036
https://jenkins.canonical.com/system-enablement/job/snappy-hwe-snaps-snap-build-prepare/393/
Executed test runs:
    SUCCESS: https://jenkins.canonical.com/system-enablement/job/snappy-hwe-snaps-snap-build/ARCHITECTURE=amd64/426
    SUCCESS: https://jenkins.canonical.com/system-enablement/job/snappy-hwe-snaps-snap-build/ARCHITECTURE=arm64/426
    SUCCESS: https://jenkins.canonical.com/system-enablement/job/snappy-hwe-snaps-snap-build/ARCHITECTURE=armhf/426
    SUCCESS: https://jenkins.canonical.com/system-enablement/job/snappy-hwe-snaps-snap-build/ARCHITECTURE=i386/426
    SUCCESS: https://jenkins.canonical.com/system-enablement/job/snappy-hwe-snaps-snap-docs/1218
    SUCCESS: https://jenkins.canonical.com/system-enablement/job/snappy-hwe-snaps-snap-cleanup/960
    None: https://jenkins.canonical.com/system-enablement/job/snappy-hwe-snaps-snap-update-mp/1006/console

Click here to trigger a rebuild:
https://jenkins.canonical.com/system-enablement/job/snappy-hwe-snaps-snap-build-prepare/393/rebuild

review: Approve (continuous-integration)

diff --git a/.gitignore b/.gitignore
index 2c95f33..8ef8c0a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,6 @@
 /parts/
 /prime/
 /snap/.snapcraft
+/tests-extras/
+
+network-manager_*_*.snap