[NaCl SDK] nacl_io: fix bionic build

getnameinfo has a slightly different signature on bionic.

TEST=./build_tools/build_sdk.py --bionic

Review URL: https://codereview.chromium.org/523043004

Cr-Commit-Position: refs/heads/master@{#292725}

native_client_sdk/src/libraries/nacl_io/syscalls/getnameinfo.c

@@ -6,9 +6,15 @@
 #include "nacl_io/kernel_wrap.h"
 
 #ifdef __native_client__
-int getnameinfo(const struct sockaddr *sa, socklen_t salen, char *host,
-                socklen_t hostlen, char *serv, socklen_t servlen,
+#ifdef __BIONIC__
+// bionic has a slightly different signatute to glibc for getnameinfo
+int getnameinfo(const struct sockaddr* sa, socklen_t salen, char* host,
+                size_t hostlen, char* serv, size_t servlen, int flags) {
+#else
+int getnameinfo(const struct sockaddr* sa, socklen_t salen, char* host,
+                socklen_t hostlen, char* serv, socklen_t servlen,
                 unsigned int flags) {
+#endif
   return ki_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
 }
 #endif