[mechanics] fix typo case insentitive
#define DEBUG_MESSAGES 1
#include "siconos_debug.h"
-#include <BulletCollision/GImpact/btGImpactShape.h>
+#include <BulletCollision/Gimpact/btGImpactShape.h>
#include "BulletCollision/CollisionShapes/btConvex2dShape.h"
void display_info_collision_object(const btCollisionObject* collisionObject)
{
