android build: support lack of __ANDROID__ in older toolchains

The external master repo uses
  arm-eabi-4.4.3
which doesn't define
  __ANDROID__
causing the newly added conditionals to fail, leading to
an redefinition of 'struct iphdr'.


Change-Id: If92e3e7c221f903c8f6f92d7dba91de59314769e
1 file changed