Improved BYTE_ORDER detection for Android cross-compilation.

Android-without-NaCl.mk

@@ -42,7 +42,7 @@ LOCAL_CFLAGS += \
         -DHAVE_ERRNO_H=1 -DHAVE_STDLIB_H=1 -DHAVE_STRINGS_H=1 -DHAVE_UNISTD_H=1 \
         -DHAVE_STRING_H=1 -DHAVE_ARPA_INET_H=1 -DHAVE_SYS_SOCKET_H=1 \
         -DHAVE_SYS_MMAN_H=1 -DHAVE_SYS_TIME_H=1 -DHAVE_POLL_H=1 -DHAVE_NETDB_H=1 \
-	-DBYTE_ORDER=LITTLE_ENDIAN
+	-DHAVE_SYS_ENDIAN_H=1
 
 include $(BUILD_SHARED_LIBRARY)
 

sha2.c

@@ -33,6 +33,9 @@
 
 #include <string.h>	/* memcpy()/memset() or bcopy()/bzero() */
 #include <assert.h>	/* assert() */
+#ifdef HAVE_SYS_ENDIAN_H
+#include <sys/endian.h>
+#endif
 #include "sha2.h"
 
 /*