Clean up tests

tests/stdlib/env.c

@@ -0,0 +1,11 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+int main() {
+    //puts(getenv("SHELL"));
+    //puts(getenv("CC"));
+
+    putenv("TEST=It's working!!");
+
+    puts(getenv("TEST"));
+}