make do-link executable from /usr/bin/env

On openbsd the script interpreter of an interpreter script can't be an
interpreter script (script(7)) so do-link must be ran with /usr/bin/env
which means the type parameter needs to be a variable set in the do
file.

1 files changed, 2 insertions, 1 deletions

diff --git a/libpack.do b/libpack.do
index 9fa753d..8cd27f6 100755
--- a/libpack.do
+++ b/libpack.do
@@ -1,2 +1,3 @@
-#!./do-link library
+#!/usr/bin/env ./do-link
+type=library
 objects=(common.o pack.o trace.o unpack.o ieee754b.o)