package/squeezelite: bump to version 71c012ad9ba102feb95823b7b9dc17e5305689c7

package/squeezelite: bump to version 71c012ad9ba102feb95823b7b9dc17e5305689c7

- Switch site to https://github.com/ralph-irving/squeezelite.

  Indeed the current upstream used in Buildroot has been automatically
  exported from code.google.com/p/squeezelite and has seen no updates
  since 4 years. Comparatively the new upstream is active (updated in
  March 2019), includes the four out-of-tree patches we had, is
  declared as the official repository on wikipedia
  (https://en.wikipedia.org/wiki/Squeezelite), and drawn interest from
  debian maintainer
  (https://github.com/ralph-irving/squeezelite/issues/29).

- Remove all patches (already in version)

- Update hash of license file (new author added:
  https://github.com/ralph-irving/squeezelite/commit/b8e5cd2d94fd280b8e858dd52ba05a7c6b07a514)

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>