userspace/libc_test: add test functions for various libc components

Signed-off-by: EnderIce2 <enderice2@protonmail.com>

Userspace/apps/test/libc_test/dirent/alphasort.c

@@ -16,3 +16,5 @@
 */
 
 #include <dirent.h>
+
+int test_alphasort(void) { return 2; }

Userspace/apps/test/libc_test/dirent/closedir.c

@@ -16,3 +16,5 @@
 */
 
 #include <dirent.h>
+
+int test_closedir(void) { return 2; }

Userspace/apps/test/libc_test/dirent/dirfd.c

@@ -16,3 +16,5 @@
 */
 
 #include <dirent.h>
+
+int test_dirfd(void) { return 2; }

Userspace/apps/test/libc_test/dirent/fdopendir.c

@@ -16,3 +16,5 @@
 */
 
 #include <dirent.h>
+
+int test_fdopendir(void) { return 2; }

Userspace/apps/test/libc_test/dirent/opendir.c

@@ -16,3 +16,5 @@
 */
 
 #include <dirent.h>
+
+int test_opendir() { return 2; }

Userspace/apps/test/libc_test/dirent/posix_getdents.c

@@ -16,3 +16,5 @@
 */
 
 #include <dirent.h>
+
+int test_posix_getdents() { return 2; }

Userspace/apps/test/libc_test/dirent/readdir.c

@@ -16,3 +16,5 @@
 */
 
 #include <dirent.h>
+
+int test_readdir() { return 2; }

Userspace/apps/test/libc_test/dirent/readdir_r.c

@@ -16,3 +16,5 @@
 */
 
 #include <dirent.h>
+
+int test_readdir_r() { return 2; }

Userspace/apps/test/libc_test/dirent/rewinddir.c

@@ -16,3 +16,5 @@
 */
 
 #include <dirent.h>
+
+int test_rewinddir() { return 2; }

Userspace/apps/test/libc_test/dirent/scandir.c

@@ -16,3 +16,5 @@
 */
 
 #include <dirent.h>
+
+int test_scandir() { return 2; }

Userspace/apps/test/libc_test/dirent/seekdir.c

@@ -16,3 +16,5 @@
 */
 
 #include <dirent.h>
+
+int test_seekdir() { return 2; }

Userspace/apps/test/libc_test/dirent/telldir.c

@@ -16,3 +16,5 @@
 */
 
 #include <dirent.h>
+
+int test_telldir() { return 2; }