Workaround for frecon not releasing input to chrome.

f0a925a7aeacdcfa77aaf0ed96ba32faff513faa
added term_activate() call in splash_run().
This grabs the input but never releases it.
I don't know where it's supposed to be released, so tentatively adding this
near "Now Chrome can take over" comment.

BUG=chromium:450400
TEST=boot veyron_jerry, able to move cursor and type in password

Change-Id: I04eae97d8cb3cfd65dc67e86252aae95f61f048c
Previous-Reviewed-on: https://chromium-review.googlesource.com/273007
(cherry picked from commit de85395bc737c7d383063cc5a62bf58f0cae3351)
Reviewed-on: https://chromium-review.googlesource.com/276756
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Tested-by: David Sodman <dsodman@chromium.org>
diff --git a/splash.c b/splash.c
index 5d53029..1306a97 100644
--- a/splash.c
+++ b/splash.c
@@ -201,6 +201,7 @@
 	}
 
 	input_set_current(NULL);
+	input_ungrab();
 
 	/*
 	 * Now Chrome can take over