[Buildroot] [git commit master 1/1] dependencies: add svn as a mandatory tool

[Thomas Petazzoni]

commit: http://git.buildroot.net/buildroot/commit/?id=3b207de011d13042b589031061bbe0d940e7b204
branch: http://git.buildroot.net/buildroot/commit/?id=refs/heads/master

Now that two packages (tremor and libsvgtiny) are being downloaded
from svn, svn becomes a mandatory tool to run Buildroot.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>

Patch is too large, so refusing to show it