help with building gitaly with hardening enabled

[Pirate Praveen <praveen@onenetbeyond.org>]

Hi go team,

I am trying to update gitaly and pushed 13.4.6 version to salsa. But 
build is failing with this error

go build runtime/cgo: invalid flag in go:cgo_ldflag: -Wl,-z,now

If I comment out 'export DEB_BUILD_MAINT_OPTIONS = hardening=+all' line 
in rules, it is building fine.

Tod be sure this is not specific to the new upstream version, I tried 
to build the version of gitlay in the archive and it is also failing 
with the same error.

Any ideas how to go about this? This probably affects many more 
packages too.

Thanks
Praveen