add some stubs to socket and os.sysconf

Author: timfel

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/modules/PosixModuleBuiltins.java

@@ -2022,8 +2022,11 @@ protected ArgumentClinicProvider getArgumentClinic() {
         }
 
         @Specialization
-        int sysconf(@SuppressWarnings("unused") String mask) {
-            throw raise(PythonBuiltinClassType.ValueError, "unrecognized configuration name");
+        int sysconf(String mask) {
+            if ("SC_CLK_TCK".equals(mask)) {
+                return 100; // it's 100 on most default kernel configs.
+            }
+            throw raise(PythonBuiltinClassType.ValueError, "unrecognized configuration name: %s", mask);
         }
     }
 

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/modules/SocketModuleBuiltins.java

@@ -215,6 +215,9 @@ public void initialize(PythonCore core) {
         builtinConstants.put("AF_UNSPEC", AF_UNSPEC);
         builtinConstants.put("AF_INET", AF_INET);
         builtinConstants.put("AF_INET6", AF_INET6);
+        // These aren't really supported, but we can fail later...
+        builtinConstants.put("AF_UNIX", -1);
+        builtinConstants.put("AF_PACKET", -1);
         if (ImageInfo.inImageBuildtimeCode()) {
             // we do this eagerly for SVM images
             services = parseServices(core.getContext().getEnv());