buildman: Rename the good, better, worse variables

At present we don't distinguish between errors and warnings when printing
the architecture summary. Rename the variables to better describe their
purpose.

'Worse' at present means we got an error, so use that as the name.
Signed-off-by: NSimon Glass <sjg@chromium.org>

tools/buildman/builder.py

@@ -1196,10 +1196,10 @@ class Builder:
                 Print('   ' + line, newline=True, colour=col)
 
 
-        better = []     # List of boards fixed since last commit
-        worse = []      # List of new broken boards since last commit
-        new = []        # List of boards that didn't exist last time
-        unknown = []    # List of boards that were not built
+        ok_boards = []      # List of boards fixed since last commit
+        err_boards = []     # List of new broken boards since last commit
+        new_boards = []     # List of boards that didn't exist last time
+        unknown_boards = [] # List of boards that were not built
 
         for target in board_dict:
             if target not in board_selected:
@@ -1210,13 +1210,13 @@ class Builder:
                 base_outcome = self._base_board_dict[target].rc
                 outcome = board_dict[target]
                 if outcome.rc == OUTCOME_UNKNOWN:
-                    unknown.append(target)
+                    unknown_boards.append(target)
                 elif outcome.rc < base_outcome:
-                    better.append(target)
+                    ok_boards.append(target)
                 elif outcome.rc > base_outcome:
-                    worse.append(target)
+                    err_boards.append(target)
             else:
-                new.append(target)
+                new_boards.append(target)
 
         # Get a list of errors that have appeared, and disappeared
         better_err, worse_err = _CalcErrorDelta(self._base_err_lines,
@@ -1225,16 +1225,16 @@ class Builder:
                 self._base_warn_line_boards, warn_lines, warn_line_boards, 'w')
 
         # Display results by arch
-        if (better or worse or unknown or new or worse_err or better_err
-                or worse_warn or better_warn):
+        if any((ok_boards, err_boards, unknown_boards, new_boards, worse_err,
+                better_err, worse_warn, better_warn)):
             arch_list = {}
-            self.AddOutcome(board_selected, arch_list, better, '',
+            self.AddOutcome(board_selected, arch_list, ok_boards, '',
                     self.col.GREEN)
-            self.AddOutcome(board_selected, arch_list, worse, '+',
+            self.AddOutcome(board_selected, arch_list, err_boards, '+',
                     self.col.RED)
-            self.AddOutcome(board_selected, arch_list, new, '*', self.col.BLUE)
+            self.AddOutcome(board_selected, arch_list, new_boards, '*', self.col.BLUE)
             if self._show_unknown:
-                self.AddOutcome(board_selected, arch_list, unknown, '?',
+                self.AddOutcome(board_selected, arch_list, unknown_boards, '?',
                         self.col.MAGENTA)
             for arch, target_list in arch_list.iteritems():
                 Print('%10s: %s' % (arch, target_list))