templates/Makefile: don't depend on local umask setting
Don't take the local umask setting into account when installing the
templates/* files and directories, running 'make install' with umask set
to 077 resulted in template/* installed with permissions 700 and 600.
The problem was discovered by Florian Zumbiehl, reported through
http://bugs.debian.org/467518
Signed-off-by: Gerrit Pape <pape@smarden.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>