Keep generating rpath on Haiku as requested by @SeanTAllen

ponylang#5358 (comment)

Author: ahwayakchih

cmake/RunFullPrograms.cmake

@@ -28,12 +28,6 @@ endif()
 # where it already exists.
 file(MAKE_DIRECTORY "${OUTPUT}")
 
-# On Haiku create symlink lib -> test_lib in target directory,
-# to use system's default path to find custom libraries needed to run executables.
-if(${CMAKE_HOST_SYSTEM_NAME} MATCHES "Haiku")
-    file(CREATE_LINK "${TEST_LIB}" "${OUTPUT}/lib" SYMBOLIC)
-endif()
-
 set(_run "${RUNNER}"
     "--debugger=$ENV{PONY_TEST_DEBUGGER}"
     "--timeout_s=${_timeout}"

src/libponyc/codegen/genexe.cc

@@ -1521,12 +1521,7 @@ static bool link_exe_lld_elf(compile_t* c, ast_t* program,
     snprintf(buf, sizeof(buf), "-L%s", path);
     args.push_back(stringtab(c->opt->strtab, buf));
 
-    // On Haiku installations go to one of standard paths, so there's no need
-    // to support non-standard installations. It also would end up with incorrect
-    // RUNPATHs specified in pony-[lsp|doc|lint] executables because
-    // `cmake --install` does not update RUNPATHS for target environment
-    // and paths stay as they are for build environment.
-    if(!c->opt->staticbin && !is_haiku)
+    if(!c->opt->staticbin)
     {
       args.push_back("-rpath");
       args.push_back(path);