Always output excuses for packages with "wrong source" issues

Previously whether such packages received excuses, and the specific
content of such excuses, was dependent on the order in which their
binary packages were considered.

Signed-off-by: Adam D. Barratt <adam@adam-barratt.org.uk>

britney.py

@@ -1158,14 +1158,14 @@ class Britney(object):
             if not same_source(source_t[VERSION], pkgsv):
                 anywrongver = True
                 excuse.addhtml("From wrong source: %s %s (%s not %s)" % (pkg_name, binary_u[VERSION], pkgsv, source_t[VERSION]))
-                break
+                continue
 
             # if the source package has been updated in unstable and this is a binary migration, skip it
             # (the binaries are now out-of-date)
             if same_source(source_t[VERSION], pkgsv) and source_t[VERSION] != source_u[VERSION]:
                 anywrongver = True
                 excuse.addhtml("From wrong source: %s %s (%s not %s)" % (pkg_name, binary_u[VERSION], pkgsv, source_u[VERSION]))
-                break
+                continue
 
             # find unsatisfied dependencies for the new binary package
             self.excuse_unsat_deps(pkg_name, src, arch, suite, excuse)