Merge "install_prereq: Check if is installed aptitude otherwise to install." into 13

diff --cc contrib/scripts/install_prereq
index 0e6fbcf81aaac9fbd001088e9842e128731b29ef,f8d5c534d87f250004493768798a645982d02ec7..afad1f71967f30eb45454222813779fb2ae6cc7a
--- 1/contrib/scripts/install_prereq
--- 2/contrib/scripts/install_prereq
+++ b/contrib/scripts/install_prereq
@@@ -96,8 -97,10 +97,11 @@@ check_installed_pkgs() 
  }
  
  handle_debian() {
+       if ! [ -x "$(command -v aptitude)" ]; then
+               apt-get install aptitude
+       fi
        extra_packs=`check_installed_debs $PACKAGES_DEBIAN`
 +      $testcmd aptitude update
        $testcmd aptitude install -y $extra_packs
  }