changed geographiclib to <depend> tag

[VAM7686]

Currently, robot_localization only pulls in the GeographicLib package as a build dependency and only installs libgeographic19 which gives us the shared library files, but not the headers.

Since #626 added headers from GeographicLib the tags for GeographicLib in package.xml need to be changed from <build_depend> to <depend>

[ayrton04]

So changing it to a depend installs the headers? We don't need to change the dependency to geographiclib-dev or anything?

[ayrton04]

Merging, since this won't hurt anything regardless of the answer to my question.

[VAM7686]

So changing it to a depend installs the headers? We don't need to change the dependency to geographiclib-dev or anything?

The <build_depend> tag only installs the dependency to build the package and not for execution time. Changing it to <depend> tags is the same as specifying <build_depend>, <build_export_depend>, and <exec_depend> for the dependency. Doing so installs the dependency to be used at build time and execution time. More information about the dependency tags can be found at REP 149.