Add support for ${s_*} and ${d_*} macros for in FDF file for the INF files, and for each statement in the build rules.
The following keywords are supported:
"src", "s_path", "s_dir", "s_name", "s_base", "s_ext", "dst", "d_path", "d_name", "d_base", "d_ext" 

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Abner Chang <abner.chang@hp.com>
Reviewed-by: Yingke Liu <yingke.d.liu@intel.com>
Reviewed-by: Larry Hauch <larry.hauch@intel.com>


git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16094 6f19259b-4bc3-4df7-8a09-765794883524