DEV:  customBuild.properties:  append instead of overwrite
DEV:  customBuild.properties:  append instead of overwrite

[git-p4: depot-paths = "//open/dev/": change = 9401]

LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb,LucidDB/luciddb