[monitoring-plugins] Ignore .dirstamp files in gnulib

[RincewindsHat]

 Module: monitoring-plugins
 Branch: master
 Commit: dca0927b459ca7f1260d1d359865d3821297d81a
 Author: RincewindsHat <12514511+RincewindsHat at users.noreply.github.com>
   Date: Mon Feb  6 18:27:53 2023 +0100
    URL: https://www.monitoring-plugins.org/repositories/monitoring-plugins/commit/?id=dca0927

Ignore .dirstamp files in gnulib

---

 .gitignore          | 1 +
 gl/malloc/.dirstamp | 0
 2 files changed, 1 insertion(+)

diff --git a/.gitignore b/.gitignore
index 462b660..2c6fa93 100644
--- a/.gitignore
+++ b/.gitignore
@@ -68,6 +68,7 @@ NP-VERSION-FILE
 /gl/locale.h
 /gl/Makefile
 /gl/Makefile.in
+/gl/malloc/.dirstamp
 /gl/malloc/.deps
 /gl/math.h
 /gl/netdb.h
diff --git a/gl/malloc/.dirstamp b/gl/malloc/.dirstamp
deleted file mode 100644
index e69de29..0000000