[backend] get_modulemd: make use of passed module information

This somehow was left out in the implementation.

src/backend/BSSrcServer/Modulemd.pm

@@ -113,7 +113,7 @@ sub tostream {
   }
   $md = $md->{'data'};
   my ($versionprefix, $distprefix, @distprovides) = split(':', $modularityplatform);
-  my %distprovides = map {$_ => 1} @distprovides;
+  my %distprovides = map {$_ => $_} @distprovides;
   for (@distprovides) {
     $distprovides{"$1-*"} = $_ if /^(.*)-/;
   }
@@ -133,7 +133,13 @@ sub tostream {
       last unless $good;
     }
     next unless $good;
-    my @newbuildrequires;
+
+    # add modules data to provides
+    for (@{$modules || []}) {
+      $distprovides{$_} = $_;
+      $distprovides{"$1-*"} = $_ if /^(.*)-/;
+    }
+
     my %brmap;
     for my $br (@$buildrequires) {
       my ($n, @v) = split(':', $br);
@@ -166,6 +172,7 @@ sub tostream {
       my ($n, @v) = split(':', $_);
       $newdeps->{'buildrequires'}->{$n} = \@v;
     }
+    last;
   }
   die("could not select dependency block\n") unless $newdeps;
   $md->{'dependencies'} = [ $newdeps ];