cmake HAVE_XFS_H examples

nfs-ganesha/nfs-ganesha src/CMakeLists.txt :796 

check_include_files("xfs/xfs.h" HAVE_XFS_H)

nfs-ganesha/nfs-ganesha src/CMakeLists.txt :804 

endif((NOT HAVE_XFS_LIB) OR (NOT HAVE_XFS_H))