Update build.git.clean.command to be more robust against entries that might be in .gitignore_global

• Type: Task
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: None
• Fix Version/s: 7.0.X, 7.1.X, 7.2.X
• Component/s: Dev Tools > Portal Build Env
• Labels: None
• Branch Version/s:
  7.2.x, 7.1.x, 7.0.x
• Backported to Branch:
  Committed

If your .gitignore_global contains entries like:

• *.jar
• *.war
• *.class

ant clean ends up wiping files it should ignore.