cmake: generalize the handling of the CLAR_TEST_OBJS list

A late-comer to the v2.49.0 party, `sk/unit-test-oid`, added yet another
array item to `CLAR_TEST_OBJS`, causing the `win+VS build` job to fail
with symptoms like this one:

  unit-tests-lib.lib(u-oid-array.obj) : error LNK2019: unresolved
  external symbol cl_parse_any_oid referenced in function fill_array

This is a similar scenario to the one that forced me to write
8afda42 (cmake: generalize the handling of the `UNIT_TEST_OBJS`
list, 2024-09-18): The hard-coded echo of `CLAR_TEST_OBJS` in
`CMakeLists.txt` that recapitulates faithfully what was already
hard-coded in `Makefile` would either have to be updated whack-a-mole
style, or generalized.

Just like I chose the latter option for `UNIT_TEST_OBJS`, I now do the
same for `CLAR_TEST_OBJS`.

Signed-off-by: Johannes Schindelin <[email protected]>

Author: dscho

contrib/buildsystems/CMakeLists.txt

@@ -1079,13 +1079,13 @@ add_custom_command(OUTPUT "${CMAKE_BINARY_DIR}/t/unit-tests/clar.suite"
 	VERBATIM)
 
 add_library(unit-tests-lib ${clar_test_SUITES}
-	"${CMAKE_SOURCE_DIR}/t/unit-tests/clar/clar.c"
 	"${CMAKE_BINARY_DIR}/t/unit-tests/clar-decls.h"
 	"${CMAKE_BINARY_DIR}/t/unit-tests/clar.suite"
 )
+target_include_directories(clar-test-lib PUBLIC "${CMAKE_BINARY_DIR}/t/unit-tests")
 target_include_directories(unit-tests-lib PUBLIC "${CMAKE_BINARY_DIR}/t/unit-tests")
-add_executable(unit-tests "${CMAKE_SOURCE_DIR}/t/unit-tests/unit-test.c")
-target_link_libraries(unit-tests unit-tests-lib common-main)
+add_executable(unit-tests)
+target_link_libraries(unit-tests unit-tests-lib clar-test-lib common-main)
 set_target_properties(unit-tests
 	PROPERTIES RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/t/unit-tests/bin)
 if(MSVC)