Add flex and bison to gitlab ci file, update cookbook and relibc

.gitlab-ci.yml

@@ -7,9 +7,11 @@ before_script:
  - |
     apt-get update -qq &&
     apt-get install -qq \
+        bison \
         build-essential \
         curl \
         dosfstools \
+        flex \
         fuse \
         genisoimage \
         git \

cookbook @ c656918e

-Subproject commit 0c47839c2c8f2cd3f5f990bda07e1c54bea5feed
+Subproject commit c656918ea34828a3005f5ceb968a89a3a18fa797

relibc @ de432712

-Subproject commit 9790289aec9c778be3a3e7ba94358f2c6b3cbea7
+Subproject commit de432712045ee7ce72912c028d40d8ddff23d2c8