qibuild/cmake: fix previous fix in qi_stage_lib ...
qibuild/cmake: fix previous fix in qi_stage_lib ...

this construct is just horrible:

create_lib(foo ...)
stage_lib(foo ${CMAKE_CURRENT_SOURCE_DIR})

what we *really* want is:

include_directories(${CMAKE_CURRENT_SOURCE_DIR})
qi_stage_lib(foo)

....

aldebaran/qibuild,dmerejkowsky/qibuild,dmerejkowsky/qibuild,aldebaran/qibuild,aldebaran/qibuild,aldebaran/qibuild,dmerejkowsky/qibuild,dmerejkowsky/qibuild,dmerejkowsky/qibuild