Fix error when provisioning Vagrant environment

[yano3]

Fix error when provisioning Vagrant environment.

    default: crypto/comp/c_zlib.c:35:11: fatal error: zlib.h: No such file or directory
    default:  # include <zlib.h>
    default:            ^~~~~~~~
    default: compilation terminated.

Pull-Request Check List

• Add patches into src/.
• Add test into test/. Please see about test docs.
• Add docs into docs/ if you change the features such as build system, Ruby methods, class and nginx directives.

[matsumotory]

Sorry for my late response. Thanks @yano3 !