package/waf: bump to v2.1.5

For change log, see:
https://gitlab.com/ita1024/waf/-/blob/waf-2.1.5/ChangeLog

Tested with `./utils/test-pkg -p ntpsec` (ntpsec is a waf-package)

Signed-off-by: Titouan Christophe <titouan.christophe@mind.be>
Signed-off-by: Titouan Christophe <titouanchristophe@gmail.com>
[Julien: add link to change log]
Signed-off-by: Julien Olivain <ju.o@free.fr>

package/waf/waf.hash

@@ -1,7 +1,7 @@
 # Locally computed
-sha1  9ee587d802ffd15a2e7cae579560d00754db4fad  waf-2.1.1
-sha256  2e66e01fd564f09106419389119c78143327c89a35f26ee3ed376f0ee410a14d  waf-2.1.1
+sha1  523f645690747501b19e0d107a044de514ba80b4  waf-2.1.5
+sha256  9d0b5d13e85f781b6976cfefb909b76cbc94a07419fa95d34216dca744257786  waf-2.1.5
 
 # The waf script also contains its license, but is renamed `waf` in the extract
 # step, so this is a synonym for the above, to check WAF_LICENSE
-sha256  2e66e01fd564f09106419389119c78143327c89a35f26ee3ed376f0ee410a14d  waf
+sha256  9d0b5d13e85f781b6976cfefb909b76cbc94a07419fa95d34216dca744257786  waf

package/waf/waf.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-WAF_VERSION = 2.1.1
+WAF_VERSION = 2.1.5
 WAF_SOURCE = waf-$(WAF_VERSION)
 WAF_SITE = https://waf.io
 WAF_LICENSE = BSD-3-Clause