fix modular gpl build
fix modular gpl build

pass gpl dir to modular interface includes
sorig/shogun,besser82/shogun,lisitsyn/shogun,sorig/shogun,lambday/shogun,karlnapf/shogun,karlnapf/shogun,sorig/shogun,lisitsyn/shogun,shogun-toolbox/shogun,lisitsyn/shogun,karlnapf/shogun,geektoni/shogun,lisitsyn/shogun,lisitsyn/shogun,lambday/shogun,besser82/shogun,besser82/shogun,karlnapf/shogun,sorig/shogun,lambday/shogun,lambday/shogun,sorig/shogun,geektoni/shogun,shogun-toolbox/shogun,geektoni/shogun,besser82/shogun,karlnapf/shogun,geektoni/shogun,besser82/shogun,lisitsyn/shogun,shogun-toolbox/shogun,geektoni/shogun,shogun-toolbox/shogun,besser82/shogun,lambday/shogun,karlnapf/shogun,shogun-toolbox/shogun,lambday/shogun,sorig/shogun,geektoni/shogun,shogun-toolbox/shogun