Allow passing the output directory of check scripts as argument

Such that the script can be used to regenerate the files in the repository if
the root directory is passed.

.gitlab-scripts/check-account-chart.sh

@@ -1,7 +1,7 @@
 #!/bin/sh
 set -eu
 
-OUTPUT=`mktemp -d`
+OUTPUT=${1:-`mktemp -d`}
 
 for module in account account_asset account_deposit sale_advance_payment
 do

.gitlab-scripts/check-template-modules.sh

@@ -1,7 +1,8 @@
 #!/bin/sh
 set -eu
 
-OUTPUT=`mktemp -d`
+OUTPUT=${1:-`mktemp -d`}
+
 find modules -name setup.py -print | while read path
 do
     path=`dirname "${path}"`