mknod[at](): moves from unistd.h to sys/stat.h

* this solves #10883.

headers/posix/sys/stat.h

@@ -120,6 +120,8 @@ extern int		mkdir(const char *path, mode_t mode);
 extern int		mkdirat(int fd, const char *path, mode_t mode);
 extern int		mkfifo(const char *path, mode_t mode);
 extern int		mkfifoat(int fd, const char *path, mode_t mode);
+extern int		mknod(const char *name, mode_t mode, dev_t dev);
+extern int		mknodat(int fd, const char *name, mode_t mode, dev_t dev);
 extern mode_t	umask(mode_t cmask);
 
 extern int		utimensat(int fd, const char *path,

headers/posix/unistd.h

@@ -196,9 +196,6 @@ extern int		lchown(const char *path, uid_t owner, gid_t group);
 extern int		fchownat(int fd, const char *path, uid_t owner, gid_t group,
 					int flag);
 
-extern int		mknod(const char *name, mode_t mode, dev_t dev);
-extern int		mknodat(int fd, const char *name, mode_t mode, dev_t dev);
-
 extern int		getpagesize(void);
 extern int      getdtablesize(void);
 extern long		sysconf(int name);

src/system/libroot/posix/sys/Jamfile

@@ -19,6 +19,7 @@ for architectureObject in [ MultiArchSubDirSetup ] {
 			itimer.cpp
 			mkdir.c
 			mkfifo.c
+			mknod.c
 			mman.cpp
 			rlimit.c
 			select.c

src/system/libroot/posix/sys/mknod.c

@@ -5,7 +5,7 @@
 
 
 #include <errno.h>
-#include <unistd.h>
+#include <sys/stat.h>
 
 #include <errno_private.h>
 

src/system/libroot/posix/unistd/Jamfile

@@ -28,7 +28,6 @@ for architectureObject in [ MultiArchSubDirSetup ] {
 			link.c
 			lockf.cpp
 			lseek.c
-			mknod.c
 			mount.c
 			pause.c
 			pipe.c