sim/gladevcp/inifiles use [RS274NGC]SUBROUTINE_PATH to find subroutines
This patch creates a gladevcp_lib directory so that ini file items
that specify [RS274NGC]SUBROUTINE_PATH with relative path items
can be resolved in both run-in-place (RIP) configurations and
with configurations copied by pickconfig.tcl for packaged builds.
The naming conventions used are the same as for ngcgui_lib
