libc: Add libgen.h stub functions (not implemented)

libs/libc/include/libgen.h

@@ -0,0 +1,16 @@
+#ifndef _LIBGEN_H
+#define _LIBGEN_H
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+    char* basename(char*); // Not implemented.
+    char* dirname(char*);  // Not implemented.
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

libs/libc/src/libgen.cpp

@@ -0,0 +1,15 @@
+#include <libgen.h>
+#include <luna.h>
+
+extern "C"
+{
+    char* basename(char*)
+    {
+        NOT_IMPLEMENTED("basename");
+    }
+
+    char* dirname(char*)
+    {
+        NOT_IMPLEMENTED("dirname");
+    }
+}