[backend] patchinfo: allow to skip updateinfo.xml generation

To be able collect binaries without creating update meta information.

OBS-298

docs/api/api/patchinfo.rng

@@ -133,6 +133,7 @@
       <value>optional</value>
       <value>feature</value>
       <value>ptf</value>
+      <value>no_updateinfo</value>
     </choice>
   </define>
 

src/backend/BSSched/BuildJob/Patchinfo.pm

@@ -719,8 +719,10 @@ sub build {
   };
   $update->{'pkglist'} = {'collection' => [ $col ] };
   $update->{'patchinforef'} = "$projid/$packid";        # deleted in publisher...
-  writexml("$jobdatadir/updateinfo.xml", undef, {'update' => [$update]}, $BSXML::updateinfo);
-  $bininfo->{'updateinfo.xml'} = genbininfo($jobdatadir, 'updateinfo.xml');
+  if ($category ne 'no_updateinfo') {
+    writexml("$jobdatadir/updateinfo.xml", undef, {'update' => [$update]}, $BSXML::updateinfo);
+    $bininfo->{'updateinfo.xml'} = genbininfo($jobdatadir, 'updateinfo.xml');
+  };
   writestr("$jobdatadir/logfile", undef, "update built succeeded ".localtime($now)."\n");
   $updateinfodata = {
     'packages' => \@tocopy,

src/backend/BSVerify.pm

@@ -111,7 +111,7 @@ sub verify_patchinfo {
   # This verifies the absolute minimum required content of a patchinfo file
   my $p = $_[0];
   verify_filename($p->{'name'}) if defined($p->{'name'});
-  my %allowed_categories = map {$_ => 1} qw{security recommended optional feature ptf};
+  my %allowed_categories = map {$_ => 1} qw{security recommended optional feature ptf no_updateinfo};
   die("Invalid category defined in _patchinfo\n") if defined($p->{'category'}) && !$allowed_categories{$p->{'category'}};
   for my $rt (@{$p->{'releasetarget'} || []}) {
     verify_projid($rt->{'project'});