Create a symlink to the cppunit library

[Max-Might]

To run the unittests application we need libcppunit.so It is built in another directory so we need to create a symlink or copy the library to the unittests lib directory. This patch creates a symlink to libcppunit.so

[bonefish]

I'd probably just build the library with UnitTestLib instead.

[Max-Might]

But UnitTestsLib adds a dependency to libcppunit.so and it confuses jam.

​https://github.com/haiku/haiku/blob/master/build/jam/TestsRules#L37

[pulkomandy]

Applied in hrev 50040.

[bonefish]

Replying to Max-Might:

But UnitTestsLib adds a dependency to libcppunit.so and it confuses jam.

Good point, I missed that. Symlinks have the problem that they never are never updated and thus e.g. ignorant to DEBUG level changes. I usually prefer explicit installing when preparing "execution environments" (e.g. ​http://cgit.haiku-os.org/haiku/tree/src/tests/Jamfile?id=bb0ca427dfb92ec6c7cf93389e05e3b4d8a050e8#n19) -- this also provides convenient pseudo targets that just build an prepare everything. Not sure why the unit test stuff works differently. Possibly it's just very old and didn't receive much consideration when the build system was restructured later on.