Detects the pkgconfig annotation on the module declaration only

Property definitions

nitc :: pkgconfig $ ToolContext :: pkgconfig_phase=
	# Detects the `pkgconfig` annotation on the module declaration only
	var pkgconfig_phase: Phase = new PkgconfigPhase(self, [literal_phase])
src/ffi/pkgconfig.nit:26,2--27,71