convert svn:ignore properties to .gitignore files

Signed-off-by: Janne Grunau <janne-ffmpeg@jannau.net>
(cherry picked from commit 348b8218f7a59374355c966dbe3b851a7275f952)

Signed-off-by: Reinhard Tartler <siretart@tauware.de>
38 files changed