MT#61568 debian: Switch to Rules-Requires-Root no

This field tells dpkg-buildpackage that no debian/rules target needs
to run as root-like (usually via fakeroot), and can be built with no
privileges (real or faked ones). This should make the build either
faster as there will be no interposed libc calls via an LD_PRELOAD
library like fakeroot does, and more robust as fakeroot needs to keep
up with implementation details from the system libc; or more secure if
the build was being done via real root.

The full documentation can be found with «man deb-src-control» and
at «/usr/share/doc/dpkg/spec/rootless-builds.txt».

We no longer need to build the package as (fake)root. A rebuild before
and after this change produces the same file list (except for a renamed
debug symbol file due to file contents change) and permissions.

Change-Id: If60eb03b8a7c3813fcd2dd2bab70a36b9ac7a888

debian/control

@@ -2,7 +2,7 @@ Source: ngcp-kamailio
 Section: net
 Priority: optional
 Maintainer: Sipwise Development Team <support@sipwise.com>
-Rules-Requires-Root: binary-targets
+Rules-Requires-Root: no
 Build-Depends:
  bison,
  debhelper-compat (= 13),