Fix make check-limited-abi

Mark the 4 functions as abi_only in stable_abi.toml.

Author: vstinner

Doc/data/stable_abi.dat

@@ -1349,8 +1349,10 @@
     abi_only = true
 [function.PySys_SetArgv]
     added = '3.2'
+    abi_only = true
 [function.PySys_SetArgvEx]
     added = '3.2'
+    abi_only = true
 [function.PySys_SetObject]
     added = '3.2'
 [function.PySys_SetPath]
@@ -1694,8 +1696,10 @@
     added = '3.2'
 [function.Py_SetProgramName]
     added = '3.2'
+    abi_only = true
 [function.Py_SetPythonHome]
     added = '3.2'
+    abi_only = true
 [function.Py_SetRecursionLimit]
     added = '3.2'
 [function.Py_VaBuildValue]