[lldb] [testsuite] Add split-file for check-lldb dependencies

[jankratochvil]

Summary

D85968 started to use split-file and while buildbots run fine while doing make check-lldb by hand I get:

.../llvm-monorepo-clangassert/tools/lldb/test/SymbolFile/DWARF/Output/DW_AT_declaration-with-children.s.script: line 2: split-file: command not found
failed:
  lldb-shell :: SymbolFile/DWARF/DW_AT_declaration-with-children.s

[labath]

Thanks for catching that.

lldb/test/CMakeLists.txt

82

Please keep this list sorted.

lldb/test/CMakeLists.txt

 # Add dependencies that are not exported targets when building standalone.
 if(NOT LLDB_BUILT_STANDALONE)
   add_lldb_test_dependency(
     FileCheck
     count
     dsymutil
     llvm-strip
     not
+    split-file
     yaml2obj
   )
 endif()
 
 # Add dependencies if we test with the in-tree clang.
 # This works with standalone builds as they import the clang target.
 if(TARGET clang)
   add_lldb_test_dependency(clang)
 
   if(TARGET asan)