installer::control: Put back changing of $local_pathseparator on cygwin.
installer::control: Put back changing of $local_pathseparator on cygwin.

Change-Id: Ia4fdbe027eb09e297c3d8abbd5817ff062722874

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