Fix Boost endianness detection for Android

Change-Id: I88006cced5975fc0748b33094ae39197daba49cc

boost/UnpackedTarball_boost.mk

@@ -37,6 +37,7 @@ boost_patches += boost_1_44_0-clang-warnings.patch
 boost_patches += boost_1_44_0-gcc4.8.patch
 
 boost_patches += boost.auto_link.patch
+boost_patches += boost.endian.patch
 boost_patches += boost.loplugin.patch
 boost_patches += boost.std.move.patch
 boost_patches += boost.wundef.patch

boost/boost.endian.patch

+--- foo/foo/foo/boost/detail/endian.hpp
++++ foo/foo/foo/boost/detail/endian.hpp
+@@ -28,16 +28,16 @@
+ #ifndef BOOST_DETAIL_ENDIAN_HPP
+ #define BOOST_DETAIL_ENDIAN_HPP
+ 
+-// GNU libc offers the helpful header <endian.h> which defines
++// GNU libc and Android's bionic offer the helpful header <endian.h> which defines
+ // __BYTE_ORDER
+ 
+-#if defined (__GLIBC__)
++#if defined (__GLIBC__) || defined(__ANDROID__)
+ # include <endian.h>
+ # if (__BYTE_ORDER == __LITTLE_ENDIAN)
+ #  define BOOST_LITTLE_ENDIAN
+ # elif (__BYTE_ORDER == __BIG_ENDIAN)
+ #  define BOOST_BIG_ENDIAN
+-# elif (__BYTE_ORDER == __PDP_ENDIAN)
++# elif defined(__PDP_ENDIAN) && (__BYTE_ORDER == __PDP_ENDIAN)
+ #  define BOOST_PDP_ENDIAN
+ # else
+ #  error Unknown machine endianness detected.