It is impossible to build the library if "share/cmake/torch" is not in PATH

[vshulga]

I am building the library via a script which subsequently calls "luarocks make XXX" where XXX are cwrap, paths, torch, sys, ...

"FIND_PACKAGE(Torch REQUIRED)" fails because -DCMAKE_PREFIX_PATH="$(LUA_BINDIR)/.." was removed in sys-1.1-0.rockspec

There is no such problem for other torch modules like optim, graph, ... because they contain DCMAKE_PREFIX_PATH="$(LUA_BINDIR)/.."

see discussion #7