debian/bin/buildcheck.py: Interpret ABI patterns more conventionally

Currently '*' and '**' match at least one character.  Change them to
match zero or more characters, as in shell patterns.

'*' matches anything but '!', but that has no special meaning in
symbol names or module filenames.  Change it to match anything but
'/', as in shell patterns.

debian/bin/buildcheck.py

@@ -139,9 +139,9 @@ class CheckAbi(object):
         ret = []
         for i in re.split(r'(\*\*?)', pattern):
             if i == '*':
-                ret.append(r'[^!]+')
+                ret.append(r'[^/]*')
             elif i == '**':
-                ret.append(r'.+')
+                ret.append(r'.*')
             elif i:
                 ret.append(re.escape(i))
         return re.compile('^' + ''.join(ret) + '$')