eigen-conversions: also depend on cmake-modules
eigen-conversions: also depend on cmake-modules

Without the dependency on cmake-modules, `bitbake eigen-conversions`
can possibly fail with:

```
| CMake Error at /home/lukas/dev/openembedded.org/openembedded-core/build/tmp-glibc/work/i586-oe-linux/eigen-conversions/1.11.8-r0/recipe-sysroot-native/opt/ros/indigo/share/catkin/cmake/catkinConfig.cmake:83 (find_package):
|   Could not find a package configuration file provided by "cmake_modules"
|   with any of the following names:
|
|     cmake_modulesConfig.cmake
|     cmake_modules-config.cmake
|
|   Add the installation prefix of "cmake_modules" to CMAKE_PREFIX_PATH or set
|   "cmake_modules_DIR" to a directory containing one of the above files.  If
|   "cmake_modules" provides a separate development package or SDK, be sure it
|   has been installed.
| Call Stack (most recent call first):
|   CMakeLists.txt:5 (find_package)
|
|
| -- Configuring incomplete, errors occurred!
```

The failure only occurs if cmake-modules has not been installed
before eigen-conversions is configured. Hence, the regular
regression testing with `bitbake core-image-ros-world`, which
builds many packages in parallel, did not uncover this because
make-modules was usually installed before eigen-conversions was
configured.

However, the issue is clearly reproducible with
`bitbake eigen-conversions cmake-modules -c cleanall && bitbake eigen-conversions`

The missing dependency was probably introduced by the automatic
recipe updates without checking for new dependencies.

Signed-off-by: Lukas Bulwahn <129af72297ae3dc7f8b596ccbac8c9d4dd733ed6@gmail.com>

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