Merge changes from topic "pppopns"

* changes:
  mtpd: Use PPTP implementation from upstream kernel
  mtpd: pptp: Fix endianness issues in log prints
tree: 506b6ac5543c8381112c530bb5d282b3a02c1d1a
  1. Android.bp
  2. l2tp.c
  3. MODULE_LICENSE_APACHE2
  4. mtpd.c
  5. mtpd.h
  6. mtpd.rc
  7. NOTICE
  8. pptp.c