Update variable names

Author: encukou

Tools/c-analyzer/cpython/ignored.tsv

@@ -20,8 +20,8 @@ Python/bootstrap_hash.c	py_getentropy	getentropy_works	-
 Python/fileutils.c	-	_Py_open_cloexec_works	-
 Python/fileutils.c	set_inheritable	ioctl_works	-
 # (set lazily, atomically, *after* first init)
-Modules/posixmodule.c	os_dup2_impl	dup3_works	-
-Modules/posixmodule.c	os_pipe_impl	pipe2_works	-
+Modules/posixmodule.c	os_dup2_impl	dup3_works_atomic	-
+Modules/posixmodule.c	os_pipe_impl	pipe2_works_atomic	-
 
 ## guards around resource init
 Python/thread_pthread.h	PyThread__init_thread	lib_initialized	-