ci: fix PR detection

yyx990803 · yyx990803 · commit 0f500961a981 · 2015-10-06T18:07:31.000-04:00
diff --git a/build/ci.sh b/build/ci.sh
@@ -1,4 +1,4 @@
-if [ -z "$CIRCLE_PULL_REQUEST" ]
+if [ -z "$CI_PULL_REQUEST" ]
 then
   npm run unit
   # start sauce connect
