Android: Passing sysroot /usr/include to include_directories breaks ordering

When cross-compiling to Android, the code

include_directories(${CMAKE_SYSROOT_COMPILE}/usr/include)

causes the -isystem /path/to/sysroot/usr/include argument that CMake adds to move too early in the command line. This directory is listed in CMAKE_${lang}_STANDARD_INCLUDE_DIRECTORIES and therefore should be added only at the end of the command line. It should be filtered out of user-specified directories because it is an implicit include directory.

This was discovered by discussion in Android NDK issue 452.