Set Gerrit tarball distribution to 3.10.4

Change-Id: I1505c670083e873720a51e217de0076a0eeabe1f

tarball/Makefile

diff --git a/tarball/Makefile b/tarball/Makefile
index 0a310f6..a131120 100644
--- a/tarball/Makefile
+++ b/tarball/Makefile
@@ -1,5 +1,5 @@
-WAR_VERSION=3.9.9
-BRANCH=stable-3.9
+WAR_VERSION=3.10.4
+BRANCH=stable-3.10
 URL=https://storage.googleapis.com/gerrit-releases/gerrit-$(WAR_VERSION).war
 CI_URL=https://gerrit-ci.gerritforge.com