Commit patch from Stephan Kassemeyer sent to ML

This patch aims to solve unaligned operation assert
happens in Eigen library.

This is short-term solution which in fact shall be reverted
as soon as real solution would be added to Ceres. Meanwhile
this should be acceptable to have for a while.

extern/libmv/third_party/ceres/include/ceres/internal/fixed_array.h

@@ -136,6 +136,7 @@ class FixedArray {
   // and T must be the same, otherwise callers' assumptions about use
   // of this code will be broken.
   struct InnerContainer {
+    EIGEN_MAKE_ALIGNED_OPERATOR_NEW
     T element;
   };