MdeModulePkg: fix mixed dos and linux EOL format issue

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Hot Tian <hot.tian@intel.com>


git-svn-id: https://svn.code.sf.net/p/edk2/code/branches/UDK2014.SP1@16554 6f19259b-4bc3-4df7-8a09-765794883524