debian/rules: adding extra option for qmake system

Helping the debhelper system by telling them how the Makefiles are
generated.
debian/*: adding package guh-tests

This commit readd in addition to e02d8ad09ef8a34b7f823cc51fadaa632454abca
the package guh-tests to reflect the the various testing binarys as a
additional package.
The test will be found in /usr/lib/guh/tests as the binarys are
architecture dependent. The binarys are strippend on the RPATH value.
debian/*: adding package libguh1-dev

For completeness to the package libguh1 adding the devel package libguh1-dev
that contains the ldconfig devel links to the libguh1 library.
Note! The public headers for guh are not part of this commit!

for libguh1 package see commit 888e989707ff749c54a9ac7772c97eba641f1106
debian/*: adding package guh-doc

Adding the guh-doc package for generated on-site HTML documentation.
debian/*: adding package guh-dbg

For debugging or creating a backtrace the user has to install a package
with debugging symbols. Creating a package 'guh-dbg' with not stripped
down version symbols.