Cross-compilation for Android fails

[nachtgeist]

I'm cross-compiling PCL on a Debian/Jessie using NDK r13b.

Since #1665 it fails for several .cpp files on a triggered #error directive:

[  0%] Building CXX object octree/CMakeFiles/pcl_octree.dir/src/octree_inst.cpp.o
In file included from /home/dhr/tmp/build/CMakeExternals/Source/pcl/octree/include/pcl/octree/octree_nodes.h:51:0,
                 from /home/dhr/tmp/build/CMakeExternals/Source/pcl/octree/include/pcl/octree/octree_base.h:45,
                 from /home/dhr/tmp/build/CMakeExternals/Source/pcl/octree/include/pcl/octree/octree.h:43,
                 from /home/dhr/tmp/build/CMakeExternals/Source/pcl/octree/src/octree_inst.cpp:38:
/home/dhr/tmp/build/CMakeExternals/Source/pcl/common/include/pcl/pcl_macros.h:394:4: error: #error aligned_malloc not supported on your platform
   #error aligned_malloc not supported on your platform
    ^
/home/dhr/tmp/build/CMakeExternals/Source/pcl/common/include/pcl/pcl_macros.h:410:4: error: #error aligned_free not supported on your platform
   #error aligned_free not supported on your platform
    ^