b/159148705 . All of our supported users have Linux 3.9+ at this point, so
SO_REUSEPORT should be made available to anyone who wants to use it.

diff --git a/sysroot/usr/include/asm-generic/socket.h b/sysroot/usr/include/asm-generic/socket.h
index 2d32d07..316f06c 100644
--- a/sysroot/usr/include/asm-generic/socket.h
+++ b/sysroot/usr/include/asm-generic/socket.h
@@ -22,7 +22,7 @@
 #define SO_PRIORITY	12
 #define SO_LINGER	13
 #define SO_BSDCOMPAT	14
-/* To add :#define SO_REUSEPORT 15 */
+#define SO_REUSEPORT	15
 
 #ifndef SO_PASSCRED /* powerpc only differs in these */
 #define SO_PASSCRED	16