dvd+rw-tools-7.1-bp160.1.13

- Avoid comment out of patch application that leads to failure ot
  "osc service runall"

- Use %patch -P N instead of deprecated %patchN.

- Add fix-build-with-recent-glibc.patch.
- Refresh dvd+rw-tools-buffer.patch
- Refresh growisofs-dvd-dl-undersized.patch
- Run spec-cleaner

- Explicitly BuildRequire m4.

- Change requirement from genisoimage to /usr/bin/mkisofs to allow
  the use of either wodim or cdrtools and commented out patch
  growisofs-genisoimage.patch as this prevents the use of cdrtools
  without user intervention.

- Update license in spec file to use SPDX format

- cross-build fix: use %__cc, %__cxx macros

- Remove redundant tags/sections from specfile
  (cf. packaging guidelines)

- Spec file updates:
  * Changes based on rpmdevtools templates and spec-cleaner run.
  * Added description for the patches based on openSUSE Patches Guidelines.
  * Added genisoimage in Requires:.
  * Updates in Summary: and %description.
  * Compile the package with -fno-strict-aliasing.
  * Rename btcflash binary to "dvd+rw-tools-btcflash" in order to avoid
    conflict with btcflash from cdrtools.
  * Small updates in %files section.
  * Remove the entries from %changelog.
- Removed rpm_opt_flags.diff patch (not required since the flags can be set in
  the spec file).

- remove resmgr from BuildRequires