fix after-success.sh

Author: japaric

.travis.yml

@@ -7,6 +7,7 @@ script:
   - bash ci/script.sh
 
 after_success:
+  - set -e
   - bash ci/after-success.sh
 
 branches:

ci/after-success.sh

@@ -1,6 +1,7 @@
 set -euxo pipefail
 
 main() {
+    mkdir ghp-import
     curl -Ls https://github.com/davisp/ghp-import/archive/master.tar.gz |
         tar --strip-components 1 -C ghp-import -xz