[bug] do not export -faligned-new (cmake)

[jbmouret]

On OSX (at least), compiling with cmake, we inherit the -faligned-new from here:

https://github.com/resibots/robot_dart/blob/650730c08ce5f4065931059f2beaea4c46ee0dfe/wscript#L135

=> this breaks our code

[costashatz]

@jbmouret did we fix this? or not?