SWDEV-1 - Add -ldl as linking flag for catch2 tests. (#2741)

Change-Id: I81c759363f35c3822447563e51c2db670edf9cb3

catch/external/Catch2/cmake/Catch2/Catch.cmake

@@ -216,6 +216,7 @@ function(hip_add_exe_to_target)
   catch_discover_tests(${_NAME} PROPERTIES  SKIP_REGULAR_EXPRESSION "HIP_SKIP_THIS_TEST")
   if(UNIX)
     set(_LINKER_LIBS ${_LINKER_LIBS} stdc++fs)
+    set(_LINKER_LIBS ${_LINKER_LIBS} -ldl)
   else()
     # res files are built resource files using rc files.
     # use llvm-rc exe to build the res files