hush: add two testcases

shell/hush_test/hush-bugs/env_and_func.right

@@ -0,0 +1,2 @@
+var=val
+var=old

shell/hush_test/hush-bugs/env_and_func.tests

@@ -0,0 +1,6 @@
+# UNFIXED BUG
+
+var=old
+f() { echo "var=$var"; }
+var=val f
+echo "var=$var"

shell/hush_test/hush-misc/func_args1.right

@@ -0,0 +1,5 @@
+params: a b c
+'f 1 2 3' called
+params: a b c
+'f 1 2 3' called
+params: a b c

shell/hush_test/hush-misc/func_args1.tests

@@ -0,0 +1,10 @@
+# UNFIXED BUG
+
+f() { echo "'f $1 $2 $3' called"; }
+
+set -- a b c
+echo "params: $1 $2 $3"
+f 1 2 3
+echo "params: $1 $2 $3"
+true | f 1 2 3
+echo "params: $1 $2 $3"