Revert part of 5cc2ab74af486611def7bcc14105c1a0257b41de

nghttp2ver.h is a local header, so use "" not <>

Change-Id: I62d1aebdc7c4b66035fccbba71ec9ca2edf1f07f
Reviewed-on: https://code.wireshark.org/review/3112
Reviewed-by: Evan Huus <eapache@gmail.com>