Bug#888413: lintian: Don't consider README file under debian/patches as patch file

[Vasudev Kamath <vasudev@copyninja.info>]

Package: lintian
Version: 2.5.71
Severity: normal

Dear Maintainer,

Please do not consider README file under debian/patches folder as a patch file. 

Several of my packages have a README file in the debian/patches folder which
describes naming convention to be followed while creating new patches. [1]. I noticed
that newer lintian emits patch-file-present-but-not-mentioned-in-series for README file
which I feel is not correct. Can you please exclude README file from above tag?

Cheers,

--
Vasudev

[1] https://anonscm.debian.org/git/pkg-rust/cargo.git/tree/debian/patches/README

-- System Information:
Debian Release: buster/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 4.14.0-3-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_IN, LC_CTYPE=en_IN (charmap=UTF-8), LANGUAGE=en_IN:en (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages lintian depends on:
ii  binutils                          2.29.90.20180122-1
ii  bzip2                             1.0.6-8.1
ii  diffstat                          1.61-1+b1
ii  dpkg                              1.19.0.5
ii  file                              1:5.32-1
ii  gettext                           0.19.8.1-4
ii  intltool-debian                   0.35.0+20060710.4
ii  libapt-pkg-perl                   0.1.33
ii  libarchive-zip-perl               1.60-1
ii  libclass-accessor-perl            0.51-1
ii  libclone-perl                     0.39-1
ii  libdpkg-perl                      1.19.0.5
ii  libemail-valid-perl               1.202-1
ii  libfile-basedir-perl              0.07-1
ii  libipc-run-perl                   0.96-1
ii  liblist-moreutils-perl            0.416-1+b3
ii  libparse-debianchangelog-perl     1.2.0-12
ii  libperl5.26 [libdigest-sha-perl]  5.26.1-4
ii  libtext-levenshtein-perl          0.13-1
ii  libtimedate-perl                  2.3000-2
ii  liburi-perl                       1.73-1
ii  libxml-simple-perl                2.24-1
ii  libyaml-libyaml-perl              0.69+repack-1
ii  man-db                            2.7.6.1-4
ii  patchutils                        0.3.4-2
ii  perl                              5.26.1-4
ii  t1utils                           1.41-2
ii  xz-utils                          5.2.2-1.3

Versions of packages lintian recommends:
ii  libperlio-gzip-perl  0.19-1+b4

Versions of packages lintian suggests:
pn  binutils-multiarch     <none>
ii  dpkg-dev               1.19.0.5
ii  libhtml-parser-perl    3.72-3+b2
pn  libtext-template-perl  <none>

-- no debconf information