test/haikudepot: Fix build of haikudepottest.so

hrev54429 added some changes to logging in HaikuDepot which broke the
build of the tests.

The build for haikudepottest.so adds some cpp files from the
HaikuDepot source. Now that Logger::NameForLevel and
Logger::IsLevelEnabled are referenced in some of the code being tested
we need to include Logger.cpp as well.

This just adds Logger.cpp to the haikudepottest.so build.

Change-Id: I80a8bb2053c3c78d821ce3cf9902c3a42b0def37
Reviewed-on: https://review.haiku-os.org/c/haiku/+/3056
Reviewed-by: Adrien Destugues <[email protected]>

src/tests/apps/haikudepot/Jamfile

@@ -39,6 +39,8 @@ UnitTestLib haikudepottest.so :
 
 	ListTest.cpp
 
+	Logger.cpp
+
 	StandardMetaData.cpp
 	StandardMetaDataJsonEventListener.cpp
 	StandardMetaDataJsonEventListenerTest.cpp