package/putty: Ignore CVE-2021-33500

Since putty is only affected by this CVE on Windows, ignore it in the
stable branch.  Branch master is not affected anymore already, due to
newer version which got fixed.

Signed-off-by: Alexander Dahl <post@lespocky.de>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/putty/putty.mk

@@ -12,6 +12,9 @@ PUTTY_CPE_ID_VENDOR = putty
 PUTTY_CONF_OPTS = --disable-gtktest
 PUTTY_CONF_ENV = CFLAGS="$(TARGET_CFLAGS) -Wno-error"
 
+# Windows only, fixed for Windows with 0.75
+PUTTY_IGNORE_CVES += CVE-2021-33500
+
 ifeq ($(BR2_PACKAGE_LIBGTK2),y)
 PUTTY_CONF_OPTS += --with-gtk=2
 PUTTY_DEPENDENCIES += libgtk2