hterm: fix concat loop

Midway the script changed from "concat.py" to "concat", but that broke
this script because this has a func named "concat".  Rename the func
to avoid that.

Change-Id: Ic6097f082a2c9b1ddb16fca69296f422a09eeaae
Reviewed-on: https://chromium-review.googlesource.com/1159598
Reviewed-by: Vitaliy Shipitsyn <vsh@google.com>
Tested-by: Mike Frysinger <vapier@chromium.org>
diff --git a/hterm/bin/mkdist.sh b/hterm/bin/mkdist.sh
index edc0f15..4681cae 100755
--- a/hterm/bin/mkdist.sh
+++ b/hterm/bin/mkdist.sh
@@ -29,7 +29,7 @@
 FLAGS "$@" || exit $?
 eval set -- "${FLAGS_ARGV}"
 
-function concat() {
+function do_concat() {
   local outdir="$1"
   local concat=( concat )
 
@@ -45,7 +45,7 @@
 function main() {
   rm -rf ./dist/js/
   mkdir -p ./dist/js/
-  concat "./dist/js"
+  do_concat "./dist/js"
 }
 
 main "$@"