gbuild: need to set gb_Helper_LIBRARY_PATH_VAR for MSVC
gbuild: need to set gb_Helper_LIBRARY_PATH_VAR for MSVC

Change-Id: Ic23e6e26093ed381a1930ee6d3c1bc04ac2625b9

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core