meta: move photon/libc to root

libc/stdio/fprintf.c

@@ -0,0 +1,10 @@
+#include <stdio.h>
+
+int fprintf(FILE *fp, const char *restrict format, ...)
+{
+    va_list arg;
+    va_start(arg, format);
+    int ret = vfprintf(fp, format, arg);
+    va_end(arg);
+    return ret;
+}