refactor inet_ntop into a portability header
diff --git a/config.m4 b/config.m4
index b37658d..69f0627 100644
--- a/config.m4
+++ b/config.m4
@@ -122,6 +122,7 @@
     src/core/lib/iomgr/socket_utils_common_posix.c \
     src/core/lib/iomgr/socket_utils_linux.c \
     src/core/lib/iomgr/socket_utils_posix.c \
+    src/core/lib/iomgr/socket_utils_windows.c \
     src/core/lib/iomgr/socket_windows.c \
     src/core/lib/iomgr/tcp_client_posix.c \
     src/core/lib/iomgr/tcp_client_windows.c \