[vala/0.44] posix: Fix return-value of mknod() and c-include for tcgetsid()

[Rico Tzschichholz <ricotz src gnome org>]

commit d9f5664ef67f32c47761b832f818f2c44582a1ca
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Fri Jul 19 17:58:45 2019 +0200

    posix: Fix return-value of mknod() and c-include for tcgetsid()
    
    Introduced with 535f2734d19875ccc1f170841b72eba0c4adad1e

 vapi/posix.vapi | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/vapi/posix.vapi b/vapi/posix.vapi
index 118e96d87..069f9a15f 100644
--- a/vapi/posix.vapi
+++ b/vapi/posix.vapi
@@ -2263,7 +2263,7 @@ namespace Posix {
        [CCode (cheader_filename = "sys/stat.h")]
        public int mkdir (string path, mode_t mode);
        [CCode (cheader_filename = "sys/types.h,sys/stat.h,fcntl.h,unistd.h")]
-       public pid_t mknod (string pathname, mode_t mode, dev_t dev);
+       public int mknod (string pathname, mode_t mode, dev_t dev);
 
        [CCode (cheader_filename = "sys/stat.h")]
        public int utimensat (int dirfd, string pathname, [CCode (array_length = false)] timespec[] times, 
int flags = 0);
@@ -2674,7 +2674,7 @@ namespace Posix {
        public int group_member (gid_t gid);
        [CCode (cheader_filename = "unistd.h")]
        public pid_t setsid ();
-       [CCode (cheader_filename = "unistd.h")]
+       [CCode (cheader_filename = "termios.h", feature_test_macro = "_GNU_SOURCE")]
        public pid_t tcgetsid (int fd);
 
        [CCode (cheader_filename = "unistd.h")]