Handle Sarge amd64 case properly

Uses File::Which, (build-) dependency on libfile-which-perl added

debian/changelog

@@ -14,12 +14,14 @@ xen-tools (4.4~dev-1) UNRELEASED; urgency=low
       + now understands the --extension option.
       + also outputs the file name of the config file
     - Fixes "--extension=" with empty parameter.
+    - Sarge amd64 case handle properly
     - Remove CVS revisions from --version output
     - Preliminary support for Debian Jessie and Ubuntu Raring
     - Preliminary support for xl toolstack
     - xen-create-image: Consistently use runCommand() instead of system()
     - Makefile accepts DESTDIR=…
     - Move examples from debian/examples to examples.
+    - Uses File::Which, added (build-) dependency on libfile-which-perl
   * Add debian/gbp.conf to be able to to build xen-tools with
     git-buildpackage.
   * Clean up debian/rules:

debian/control

@@ -6,6 +6,7 @@ Build-Depends: debhelper (>= 7.0.0),
                devscripts,
                git,
                libfile-slurp-perl,
+               libfile-which-perl,
                libmoose-perl,
                libtest-pod-coverage-perl,
                libtest-pod-perl,
@@ -20,6 +21,7 @@ Architecture: all
 Depends: debootstrap | cdebootstrap,
          libconfig-inifiles-perl,
          libfile-slurp-perl,
+         libfile-which-perl,
          libtext-template-perl,
          openssh-client,
          perl-modules,