Upgrade curl to 7.64.1

Test: build
Change-Id: I31c820b646e6b7ef71e5f8763071f18d8933cb28
diff --git a/src/tool_main.c b/src/tool_main.c
index c3a81e9..5679f36 100644
--- a/src/tool_main.c
+++ b/src/tool_main.c
@@ -5,7 +5,7 @@
  *                            | (__| |_| |  _ <| |___
  *                             \___|\___/|_| \_\_____|
  *
- * Copyright (C) 1998 - 2018, Daniel Stenberg, <[email protected]>, et al.
+ * Copyright (C) 1998 - 2019, Daniel Stenberg, <[email protected]>, et al.
  *
  * This software is licensed as described in the file COPYING, which
  * you should have received as part of this distribution. The terms
@@ -112,7 +112,7 @@
       env[CURL_MT_LOGFNAME_BUFSIZE-1] = '\0';
     strcpy(fname, env);
     curl_free(env);
-    curl_memdebug(fname);
+    curl_dbg_memdebug(fname);
     /* this weird stuff here is to make curl_free() get called
        before curl_memdebug() as otherwise memory tracking will
        log a free() without an alloc! */
@@ -123,7 +123,7 @@
     char *endptr;
     long num = strtol(env, &endptr, 10);
     if((endptr != env) && (endptr == env + strlen(env)) && (num > 0))
-      curl_memlimit(num);
+      curl_dbg_memlimit(num);
     curl_free(env);
   }
 }