Fixing Signon logo on Adopters page

Change-Id: If7ff6854453dde40262f030d801557a625e23488
Signed-off-by: Florian Barbin <florian.barbin@obeo.fr>
diff --git a/images/logos/adopters/logo_signon.jpg b/images/logos/adopters/logo_signon.jpg
new file mode 100644
index 0000000..3e8a403
--- /dev/null
+++ b/images/logos/adopters/logo_signon.jpg
Binary files differ