Removed GNUism in makefile
Removed GNUism in makefile

The --preserve=timestamps is a gnu cp extension, and thus not
available on all our platforms. Replaced by equivalent tar hack.

Signed-off-by: Fridrich Štrba <3cd4daa035652512fde99585cb8cb05b406e5e73@bluewin.ch>

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