6527 - increase stack limits

We haven't run into this limit yet, but everytime I see a 'stream overflow'
error I run into it while going over all the knobs in apps/subx-params.subx,
if I increase Input-size (used by survey.subx) too much.

test_apps

@@ -25,6 +25,9 @@ export OS=${OS:-linux}
 
 echo "== translating and running using C++"
 
+# increase stack
+ulimit -S -s 131072  # 128MB
+
 # example programs
 
 echo ex1

translate_subx

@@ -19,6 +19,9 @@ set -e
 
 ./build
 
+# increase stack
+ulimit -S -s 131072  # 128MB
+
 cat $*          |apps/braces   > a.braces
 
 cat a.braces    |apps/calls    > a.calls