Thrift fix: eta data

[snilt]

To reproduce the issue:

1. Start a server with an empty queue
2. From the webinterface:
   Pause the server
   Disable download speed limit
   Add some valid package to download (preferably some large file, couple of gigabytes)
3. Start the CLI and unpause the server

Traceback (most recent call last):
...
...
File "/home/snilt/pyload/module/lib/thrift/protocol/TBinaryProtocol.py", line 110, in writeI32
buff = pack("!i", i32)
error: 'i' format requires -2147483648 <= number <= 2147483647

It seems that the server sends some bad eta value at the very beginning of a new download.
The PR just changes the data format to integer 64-bit.
(Works fine for me since years)

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[vuolter]

This PR is for pyLoad Stable, but I have to inform you that thrift is no longer supported in pyLoad Next.

[GammaC0de]

but I have to inform you that thrift is no longer supported in pyLoad Next.

@vuolter Thrift is also used by the Android app...

[vuolter]

I think we can add it as a separate package, even I actually don't like it so much to be honest.