pdh: Add PdhConnectMachineA stub.

dlls/pdh/pdh.spec

@@ -18,7 +18,7 @@
 @ stdcall PdhCollectQueryDataWithTime(ptr ptr)
 @ stdcall PdhCollectQueryDataEx(ptr long ptr)
 @ stub PdhComputeCounterStatistics
-@ stub PdhConnectMachineA
+@ stdcall PdhConnectMachineA(str)
 @ stub PdhConnectMachineW
 @ stub PdhCreateSQLTablesA
 @ stub PdhCreateSQLTablesW

dlls/pdh/pdh_main.c

@@ -1280,3 +1280,12 @@ PDH_STATUS WINAPI PdhBindInputDataSourceW(PDH_HLOG *source, const WCHAR *filenam
     FIXME("%p %s: stub\n", source, debugstr_w(filenamelist));
     return PDH_NOT_IMPLEMENTED;
 }
+
+/***********************************************************************
+ *              PdhConnectMachineA   (PDH.@)
+ */
+PDH_STATUS WINAPI PdhConnectMachineA(const char *name)
+{
+    FIXME("%s: stub\n", debugstr_a(name));
+    return PDH_NOT_IMPLEMENTED;
+}