zsync-curl: Add UPSTREAM_CHECK_COMMITS

Upstream repo does not tag so, use UPSTREAM_CHECK_COMMITS to detect
upstream updates.

Signed-off-by: Yoann Congal <yoann.congal@smile.fr>
Reviewed-by: Alexandre Truong <alexandre.truong@smile.fr>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-extended/zsync/zsync-curl_git.bb

@@ -12,6 +12,9 @@ SRCREV = "00141c2806ccc4ddf2ff6263ee1612d19c0b713f"
 
 PV = "0.6.2+git"
 
+# Upstream repo does not tag
+UPSTREAM_CHECK_COMMITS = "1"
+
 inherit autotools
 
 S = "${WORKDIR}/git"