Add dependent libraries on linker line for libraries.
Check parameter before use in Toolchain#linker_line_for.
Introduce again -Wl,--no-as-needed. This change is necessary
  because otherwise we get unresolved symbols at final link stage.
Version bump to rakeoe-0.0.7.


Signed-off-by: Daniel Schnell <dschnell@skerpa.com>