[Git]Add gitattributes for shared line endings configuration.
[Git]Add gitattributes for shared line endings configuration.

Change-Id: Ic1d1c7b017d201bd1769ec784c5e043575ddea60
Signed-off-by: Florent Latombe <9e0fa24eb490347831df11404496e16e8bafc797@obeo.fr>

ObeoNetwork/M2Doc,ObeoNetwork/M2Doc,ylussaud/M2Doc,ylussaud/M2Doc,ObeoNetwork/M2Doc