add rosbduil/mk to depend

https://s3.amazonaws.com/archive.travis-ci.org/jobs/22510326/log.txt said
```

{-------------------------------------------------------------------------------
  mkdir -p bin
  cd build && cmake -Wdev -DCMAKE_TOOLCHAIN_FILE=/core/rosbuild/rostoolchain.cmake -DUSE_ROSBUILD:BOOL=1 ..
  CMake Error at /usr/share/cmake-2.8/Modules/CMakeDetermineSystem.cmake:95 (MESSAGE):
    Could not find toolchain file: /core/rosbuild/rostoolchain.cmake
  Call Stack (most recent call first):
    
  
  
  CMake Error: Error required internal CMake variable not set, cmake may be not be built correctly.
  Missing variable is:
  CMAKE_C_COMPILER_ENV_VAR
  CMake Error: Error required internal CMake variable not set, cmake may be not be built correctly.
  Missing variable is:
  CMAKE_C_COMPILER
  CMake Error: Could not find cmake module file:/home/travis/ros/ws_jsk_model_tools/src/jsk_model_tools/collada_tools/build/CMakeFiles/CMakeCCompiler.cmake
  CMake Error: Error required internal CMake variable not set, cmake may be not be built correctly.
  Missing variable is:
  CMAKE_CXX_COMPILER_ENV_VAR
  CMake Error: Error required internal CMake variable not set, cmake may be not be built correctly.
  Missing variable is:
  CMAKE_CXX_COMPILER
  CMake Error: Could not find cmake module file:/home/travis/ros/ws_jsk_model_tools/src/jsk_model_tools/collada_tools/build/CMakeFiles/CMakeCXXCompiler.cmake
  CMake Error: CMAKE_C_COMPILER not set, after EnableLanguage
  CMake Error: CMAKE_CXX_COMPILER not set, after EnableLanguage
  -- Configuring incomplete, errors occurred!
-------------------------------------------------------------------------------}
```