Fixed EDKT381. We can keep the system's CLASSPATH value after executing edksetup.bat and won't duplicate it with more than one time of execution.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@1769 6f19259b-4bc3-4df7-8a09-765794883524
1 file changed