Moved userspace libc to posix container directory.

Issues:
- MM0 needs separate subset of libc and not link with libposix
- FS0 needs separate subset of libc and not link with libposix
- libposix need transforming into a full-blown uclibc for test0
- libc really is a pseudo-libc that needs to be replaced as above.
- Done some hacking to avoid conflicts between pseudo-libc and libposix headers.

Now system working as original, (e.g. execve etc. working)

containers/posix/test0/src/clonetest.c

@@ -5,7 +5,7 @@
 #include <unistd.h>
 #include <sys/types.h>
 #include <sys/mman.h>
-#include <sched.h>
+#include <bits/sched.h>
 #include <errno.h>
 #include <tests.h>
 

containers/posix/test0/src/dirtest.c

@@ -16,7 +16,7 @@
 
 void print_fsize(struct stat *s)
 {
-	printf("%d", s->st_size);
+	printf("%lu", s->st_size);
 }
 
 void print_flink(struct stat *s)

containers/posix/test0/src/exectest.c

@@ -9,7 +9,7 @@
 #include <sys/stat.h>
 #include <fcntl.h>
 #include <string.h>
-#include <errno.h>
+#include <posix/errno.h>
 
 extern char _start_test_exec[];
 extern char _end_test_exec[];

containers/posix/test0/src/test_exec/test_exec.c

@@ -26,7 +26,7 @@ void main(void)
 {
 	wait_pager(0);
 	if (getpid() == 2) {
-		printf("EXECVE TEST         -- PASSED --\n", getpid());
+		printf("EXECVE TEST         -- PASSED --\n");
 		printf("\nThread (%d): Continues to sync with the pager...\n\n", getpid());
 		while (1)
 			wait_pager(0);