Fix error: cannot allocate memory in static TLS block

[helinwang]

Fixes: #4358 #4775

The error message is:

ImportError: /usr/local/lib/python2.7/dist-packages/py_paddle/_swig_paddle.so:
cannot allocate memory in static TLS block

The error is complaining the thread-local storage (TLS) is not enough. The reason should be glog added a commit that vastly increased the thread-local size. When WITH_GOLANG is ON, glog is compiled twice (once for paddle, once for the go static library), making the tread-local storage exploded.

The fix is we use a release tag of glog with not contain that commit.

[dzhwinter]

LGTM.
Please merge this fix ASAP.

[dzhwinter]

If the TLS table explode is caused by Glog, many other packages may depend on the original one without the specific tag, which may cause same error in the future easily.

BTW, I find some document says compiler may limit the TLS table size. Is it possible add one compile option?

https://gcc.gnu.org/onlinedocs/gcc/Thread-Local.html#Thread-Local
https://stackoverflow.com/questions/5450694/thread-local-storage-overhead

Finally, thread-local storage is not really meant to store large numbers of variables per thread (there are compiler-dependent limits on the size of the TLS table) but this is something you can easily work around: put many variables into a struct and make a pointer to the struct thread-local.

[helinwang]

From my limited understanding the TLS size is a libc (often glibc) limit (an implementation detail), if we compile non-static binary, we don't have the control over the runtime libc.

[wangkuiyi]

Thanks for this fix. It is a hacker's work!