run-ci: modify permissions to execute

Per discussion in Ib420c69e88e88ca0a50863c83ad43fac750d3e7a, we
are going to require these scripts to have execute permission.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I7e8cb2387fc58269bf0ee3fee97f9ece78ad91fc
diff --git a/extensions/openpower-pels/registry/run-ci.sh b/extensions/openpower-pels/registry/run-ci.sh
old mode 100644
new mode 100755