Kill LOCAL_SOCKET_NAMESPACE.

Change-Id: I18928f89f66c37be310c45ff4c05a6d47ab84f66
Kill HAVE_BIG_ENDIAN, HAVE_ENDIAN_H, and HAVE_LITTLE_ENDIAN.

Change-Id: I9e25ac9d27e95b04fb8bf7a66c619af0139d8b8f
Merge "Kill LOCAL_SOCKET_NAMESPACE."
Merge "Kill HAVE_BIG_ENDIAN, HAVE_ENDIAN_H, and HAVE_LITTLE_ENDIAN."