Remove TMPDIR from glibc's commented list

ldso/include/unsecvars.h

@@ -21,5 +21,5 @@
  *
  * LD_ORIGIN_PATH, LD_PROFILE, LD_USE_LOAD_BIAS, LD_DYNAMIC_WEAK, LD_SHOW_AUXV,
  * GCONV_PATH, GETCONF_DIR, HOSTALIASES, LOCALDOMAIN, LOCPATH, MALLOC_TRACE,
- * NLSPATH, RESOLV_HOST_CONF, RES_OPTIONS, TMPDIR, TZDIR
+ * NLSPATH, RESOLV_HOST_CONF, RES_OPTIONS, TZDIR
  */