[gnome-keyring/wip/dueno/musl] rpc-layer: fix build with musl-libc

[Daiki Ueno <dueno src gnome org>]

commit 7a8b7d2ebfbb831840e6d58dbb1109f4c31d6ba4
Author: Daiki Ueno <dueno src gnome org>
Date:   Fri May 10 15:47:33 2019 +0200

    rpc-layer: fix build with musl-libc
    
    The recent POSIX suggests to include <sys/select.h> for select().
    
    Reported by Anthony G. Basile.

 pkcs11/rpc-layer/gkm-rpc-daemon-standalone.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/pkcs11/rpc-layer/gkm-rpc-daemon-standalone.c b/pkcs11/rpc-layer/gkm-rpc-daemon-standalone.c
index 5024e1e1..b3fb6707 100644
--- a/pkcs11/rpc-layer/gkm-rpc-daemon-standalone.c
+++ b/pkcs11/rpc-layer/gkm-rpc-daemon-standalone.c
@@ -34,6 +34,7 @@
 
 #include <dlfcn.h>
 #include <pthread.h>
+#include <sys/select.h>
 
 #define SOCKET_PATH "/tmp/gkm-rpc-daemon.sock"