scanpypi: change hash file comments

sha256 checksum will be computed locally either by scanpypi at package
creation or by hand by package updates. Define this checksum as
'computed locally' so that one doesn't need to change this comment by
package updates. Also put comments for both md5 and sha256 in one line.

Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

support/scripts/scanpypi

@@ -482,15 +482,14 @@ class BuildrootPackage():
         print('Creating {filename}...'.format(filename=path_to_hash))
         lines = []
         if self.used_url['md5_digest']:
-            md5_comment = '# md5 from {url}\n'.format(url=self.metadata_url)
+            md5_comment = '# md5 from {url}, sha256 locally computed\n'.format(
+		url=self.metadata_url)
             lines.append(md5_comment)
             hash_line = '{method}\t{digest}  {filename}\n'.format(
                 method='md5',
                 digest=self.used_url['md5_digest'],
                 filename=self.filename)
             lines.append(hash_line)
-        sha256_comment = '# sha256 calculated by scanpypi\n'
-        lines.append(sha256_comment)
         digest = hashlib.sha256(self.as_string).hexdigest()
         hash_line = '{method}\t{digest}  {filename}\n'.format(
             method='sha256',