phosphor-buttons: srcrev bump 6910122589..1ac9ab6d29

Patrick Venture (1):
      transition to multi-user.target in service files

Change-Id: I0aef02d67b37cb558e68c23e81c347b39573df5e
Signed-off-by: Andrew Geissler <openbmcbump-github@yahoo.com>
diff --git a/recipes-phosphor/chassis/obmc-phosphor-buttons_git.bb b/recipes-phosphor/chassis/obmc-phosphor-buttons_git.bb
index e9517ac..6a8b041 100644
--- a/recipes-phosphor/chassis/obmc-phosphor-buttons_git.bb
+++ b/recipes-phosphor/chassis/obmc-phosphor-buttons_git.bb
@@ -7,7 +7,7 @@
 
 S = "${WORKDIR}/git"
 SRC_URI += "git://github.com/openbmc/phosphor-buttons.git"
-SRCREV = "69101225892575db3d29cb4cfe7683773f1e4f52"
+SRCREV = "1ac9ab6d29dc06bf15f1377fc8aebb21a3e5a600"
 
 inherit cmake pkgconfig systemd