run.bash: set appropriate ulimits

    mainly for NetBSD/OpenBSD.

R=bradfitz, r, rsc
CC=golang-dev
https://golang.org/cl/6453154

src/run.bash

@@ -14,6 +14,12 @@ unset GOPATH    # we disallow local import for non-local packages, if $GOROOT ha
 # no core files, please
 ulimit -c 0
 
+# Raise soft limits to hard limits for NetBSD/OpenBSD.
+# We need at least 256 files and ~300 MB of bss.
+# On OS X ulimit -S -n rejects 'unlimited'.
+[ "$(ulimit -H -n)" == "unlimited" ] || ulimit -S -n $(ulimit -H -n)
+[ "$(ulimit -H -d)" == "unlimited" ] || ulimit -S -n $(ulimit -H -d)
+
 # allow all.bash to avoid double-build of everything
 rebuild=true
 if [ "$1" = "--no-rebuild" ]; then