These files use the macro OSL_BIGENDIAN but did not include the header
that defines it.

Found via:

git grep -l OSL_.*ENDIAN | grep -v -E '\.h(xx)?$' | while read f; do case $f in *cxx) grep -L endian\\.h workdir/Dep/CxxObject/${f%.cxx}.d ;; *) grep -L endian\\.h workdir/Dep/CObject/${f%.c}.d ;; esac ; done

Change-Id: Iaf589a8235dbc8062840d2716ab843e64b5cb7a2