[Bf-codereview] Use Bullet for convex hull (issue 6741063)

[brechtvanlommel at gmail.com]

Looks ok to me, also works well in some tests. If scons files are
updated too this LGTM.


https://codereview.appspot.com/6741063/diff/1/source/blender/editors/mesh/CMakeLists.txt
File source/blender/editors/mesh/CMakeLists.txt (right):

https://codereview.appspot.com/6741063/diff/1/source/blender/editors/mesh/CMakeLists.txt#newcode77
source/blender/editors/mesh/CMakeLists.txt:77:
add_definitions(-DUSE_BULLET)
The convention is to use -DWITH_BULLET, although it looks like this is
already inconsistent elsewhere.

More importantly though, this should be add to SConscript too in both
editors/mesh/ and bmesh/.

https://codereview.appspot.com/6741063/