BaseTools/UPT: Use a simple way to get package path
BaseTools/UPT: Use a simple way to get package path

Instead of parsing all content of DEC file, just get the package
path only to save time.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Hess Chen <cd31d2c0b41e8a9f91ae5252b98c84bd235157fd@intel.com>
Reviewed-by: Yonghong Zhu <78d981fe33a016071af5222c56d5cf77f30fb0b2@intel.com>

MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2