package/bayer2rgb-neon: bump version

package/bayer2rgb-neon: bump version

Actually build fails with musl libc due to missing header inclusion
<unistd.h> (usually included by stdlib.h) in package code which in order
contains type definition of ssize_t.
A Git repository has been setted up for this project as upstream, and
contains a commit which solves build failure removing the use of ssize_t
at all.
No other http tarballs have been released on current site, so
development seems to continue on Git repository.

- Set SITE_METHOD = git
- Switch site to: https://gitlab-ext.sigma-chemnitz.de/ensc/bayer2rgb
- Bump version to latest commit to include commit which fixes build
  failure.

Fixes:
http://autobuild.buildroot.net/results/c84/c84b65642cb1b2d246f3a92ac957af5c5fcb86e8/

Signed-off-by: Giulio Benetti <giulio.benetti@micronovasrl.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>