update travis alpine chroot with avx512 intrinsics headers

.travis.yml

@@ -85,7 +85,7 @@ jobs:
       sudo: true
       language: minimal
       before_install:
-        - "wget https://raw.githubusercontent.com/alpinelinux/alpine-chroot-install/v0.9.0/alpine-chroot-install \
+        - "wget 'https://raw.githubusercontent.com/alpinelinux/alpine-chroot-install/v0.9.0/alpine-chroot-install' \
           && echo 'e5dfbbdc0c4b3363b99334510976c86bfa6cb251  alpine-chroot-install' | sha1sum -c || exit 1"
         - alpine() { /alpine/enter-chroot -u "$USER" "$@"; }
       install: