BaseTools/CommonLib: Add a step to convert ":\\" to ":\"

Convert ":\\\\" to ":\\", because it doesn't work with WINDOWS_EXTENSION_PATH.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Hess Chen <hesheng.chen@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com> 


git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16039 6f19259b-4bc3-4df7-8a09-765794883524
IntelFspPkg/IntelFspWrapperPkg: Fix some typos.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16040 6f19259b-4bc3-4df7-8a09-765794883524