Add patch script

build/patch/buildpatch.ksh

@@ -0,0 +1,14 @@
+/bin/ksh
+#
+# This script can be used to build a patch after a developer has made
+# changes on files in its Dolibarr tree.
+# The output patch file can then be submited on Dolibarr dev mailing-list,
+# with explanation on its goal, for inclusion in main branch.
+#
+
+export oldir=original_dir
+export newdir=modified_dir
+
+echo Building patch file mypatch.patch
+diff -Naur --exclude=CVS --exclude="*.patch" --exclude=".#*" --exclude="*~" --exclude="*.rej" --exclude="*.orig" --exclude="*.bak" --exclude=conf.php --exclude=documents  $olddir  $newdir  > mypatch.patch
+