include paths should not be relative starting with "../

It leads to problems with certain compilers, when Bullet/src is located in a long pathname.
Keep include path starting with "LinearMath/, "BulletCollision/, or "BulletDynamics/

src/BulletDynamics/ConstraintSolver/btConstraintSolver.h

@@ -16,7 +16,7 @@ subject to the following restrictions:
 #ifndef CONSTRAINT_SOLVER_H
 #define CONSTRAINT_SOLVER_H
 
-#include "../../LinearMath/btScalar.h"
+#include "LinearMath/btScalar.h"
 
 class btPersistentManifold;
 class btRigidBody;

src/BulletDynamics/ConstraintSolver/btContactConstraint.h

@@ -19,8 +19,8 @@ subject to the following restrictions:
 //todo: make into a proper class working with the iterative constraint solver
 
 class btRigidBody;
-#include "../../LinearMath/btVector3.h"
-#include "../../LinearMath/btScalar.h"
+#include "LinearMath/btVector3.h"
+#include "LinearMath/btScalar.h"
 struct btContactSolverInfo;
 class btManifoldPoint;
 

src/BulletDynamics/ConstraintSolver/btGeneric6DofConstraint.h

@@ -16,7 +16,7 @@ subject to the following restrictions:
 #ifndef GENERIC_6DOF_CONSTRAINT_H
 #define GENERIC_6DOF_CONSTRAINT_H
 
-#include "../../LinearMath/btVector3.h"
+#include "LinearMath/btVector3.h"
 #include "btJacobianEntry.h"
 #include "btTypedConstraint.h"
 

src/BulletDynamics/ConstraintSolver/btHingeConstraint.h

@@ -18,7 +18,7 @@ subject to the following restrictions:
 #ifndef HINGECONSTRAINT_H
 #define HINGECONSTRAINT_H
 
-#include "../../LinearMath/btVector3.h"
+#include "LinearMath/btVector3.h"
 #include "btJacobianEntry.h"
 #include "btTypedConstraint.h"
 

src/BulletDynamics/ConstraintSolver/btJacobianEntry.h

@@ -16,8 +16,8 @@ subject to the following restrictions:
 #ifndef JACOBIAN_ENTRY_H
 #define JACOBIAN_ENTRY_H
 
-#include "../../LinearMath/btVector3.h"
-#include "../Dynamics/btRigidBody.h"
+#include "LinearMath/btVector3.h"
+#include "BulletDynamics/Dynamics/btRigidBody.h"
 
 
 //notes:

src/BulletDynamics/ConstraintSolver/btPoint2PointConstraint.h

@@ -16,7 +16,7 @@ subject to the following restrictions:
 #ifndef POINT2POINTCONSTRAINT_H
 #define POINT2POINTCONSTRAINT_H
 
-#include "../../LinearMath/btVector3.h"
+#include "LinearMath/btVector3.h"
 #include "btJacobianEntry.h"
 #include "btTypedConstraint.h"
 

src/BulletDynamics/ConstraintSolver/btSolve2LinearConstraint.h

@@ -16,8 +16,8 @@ subject to the following restrictions:
 #ifndef SOLVE_2LINEAR_CONSTRAINT_H
 #define SOLVE_2LINEAR_CONSTRAINT_H
 
-#include "../../LinearMath/btMatrix3x3.h"
-#include "../../LinearMath/btVector3.h"
+#include "LinearMath/btMatrix3x3.h"
+#include "LinearMath/btVector3.h"
 
 
 class btRigidBody;

src/BulletDynamics/ConstraintSolver/btTypedConstraint.h

@@ -17,7 +17,7 @@ subject to the following restrictions:
 #define TYPED_CONSTRAINT_H
 
 class btRigidBody;
-#include "../../LinearMath/btScalar.h"
+#include "LinearMath/btScalar.h"
 
 ///TypedConstraint is the baseclass for Bullet constraints and vehicles
 class btTypedConstraint