Fix filtering of unneeded.yml

The regexps were supposed to match package names, but re.match does not
what I thought it does - it only matches the start of the line not the
end

pkglistgen/tool.py

@@ -263,7 +263,7 @@ class PkgListGen(ToolBase.ToolBase):
     # the FTP tree. We filter it with unneeded though to create a
     # unsorted.yml file for release manager review
     def _collect_unsorted_packages(self, modules, unsorted):
-        uneeded_regexps = [re.compile(r)
+        unneeded_regexps = [re.compile(r'\A' + r + r'\Z')
                             for r in self._parse_unneeded('unneeded.yml')]
 
         packages = dict()
@@ -278,7 +278,7 @@ class PkgListGen(ToolBase.ToolBase):
 
             # copy
             filtered = list(archpacks)
-            for r in uneeded_regexps:
+            for r in unneeded_regexps:
                 filtered = [p for p in filtered if not r.match(p)]
 
             # convert to set