[libc][NFC] Make all integration tests depend on the threads implemen…

…tation.

The integration tests use the loader which sets up the main thread's
self object. So, all integration tests have to depend on the threads
implementation.

libc/cmake/modules/LLVMLibCTestRules.cmake

@@ -421,13 +421,9 @@ function(add_integration_test test_name)
   get_fq_target_name(${test_name}.libc fq_libc_target_name)
 
   get_fq_deps_list(fq_deps_list ${INTEGRATION_TEST_DEPENDS})
-  # Add memory functions to which compilers can emit calls.
-  list(APPEND fq_deps_list
-          libc.src.string.bcmp
-          libc.src.string.bzero
-          libc.src.string.memcmp
-          libc.src.string.memcpy
-          libc.src.string.memset)
+  # All integration tests setup TLS area and the main thread's self object.
+  # So, we need to link in the threads implementation.
+  list(APPEND fq_deps_list libc.src.__support.threads.thread)
   list(REMOVE_DUPLICATES fq_deps_list)
   # TODO: Instead of gathering internal object files from entrypoints,
   # collect the object files with public names of entrypoints.