test(gno.land): time-simple.txtar (#2111)

This PR adds a simple regression test for a bug that was introduced in
#1702 and fixed in
#2105 .

Signed-off-by: Jeff Thompson <jeff@thefirst.org>

gno.land/cmd/gnoland/testdata/time-simple.txtar

@@ -0,0 +1,18 @@
+# Originally, the addpkg failed due to changes in PR https://github.com/gnolang/gno/pull/1702 .
+# This bug was fixed with https://github.com/gnolang/gno/pull/2105 .
+
+gnoland start
+
+gnokey maketx addpkg -pkgdir $WORK -pkgpath gno.land/r/time_simple -gas-fee 1ugnot -gas-wanted 10000000 -broadcast -chainid=tendermint_test test1
+stdout OK!
+
+-- time_simple.gno --
+package time_simple
+
+import (
+	"time"
+)
+
+func GetUnixTime() int64 {
+	return time.Now().Unix()
+}