Maybe something like this would fix it, but beware because it's completely untested:
--- a/debian/rules
+++ b/debian/rules
@@ -37,8 +37,8 @@ override_dh_auto_clean:
override_dh_auto_build:
dh_auto_build -- NO_PNG=1
-override_dh_install:
- dh_install
+override_dh_fixperms-arch:
+ dh_fixperms
chmod -x debian/hhsuite/usr/share/hhsuite/scripts/*.pm
%:
