Fix build for custom transport users
Fix build for custom transport users

We should explicitly include the declaration of git_strarray
from "include/git2/sys/transport.h"

KTXSoftware/libgit2,saurabhsuniljain/libgit2,Tousiph/Demo1,magnus98/TEST,leoyanggit/libgit2,magnus98/TEST,leoyanggit/libgit2,KTXSoftware/libgit2,magnus98/TEST,jeffhostetler/public_libgit2,yongthecoder/libgit2,joshtriplett/libgit2,leoyanggit/libgit2,Tousiph/Demo1,Corillian/libgit2,Tousiph/Demo1,KTXSoftware/libgit2,leoyanggit/libgit2,magnus98/TEST,Corillian/libgit2,yongthecoder/libgit2,Corillian/libgit2,stewid/libgit2,leoyanggit/libgit2,magnus98/TEST,yongthecoder/libgit2,stewid/libgit2,stewid/libgit2,saurabhsuniljain/libgit2,stewid/libgit2,yongthecoder/libgit2,KTXSoftware/libgit2,joshtriplett/libgit2,joshtriplett/libgit2,joshtriplett/libgit2,stewid/libgit2,KTXSoftware/libgit2,Tousiph/Demo1,jeffhostetler/public_libgit2,saurabhsuniljain/libgit2,leoyanggit/libgit2,Corillian/libgit2,saurabhsuniljain/libgit2,saurabhsuniljain/libgit2,Corillian/libgit2,saurabhsuniljain/libgit2,Tousiph/Demo1,magnus98/TEST,jeffhostetler/public_libgit2,joshtriplett/libgit2,Tousiph/Demo1,joshtriplett/libgit2,stewid/libgit2,KTXSoftware/libgit2,jeffhostetler/public_libgit2,yongthecoder/libgit2,Corillian/libgit2,yongthecoder/libgit2,jeffhostetler/public_libgit2,jeffhostetler/public_libgit2