add additional patches for PyTorch 1.7.1 to fix failing tests

[Flamefire]

(created using eb --new-pr)

This includes patches from #12003 as they basically also apply here. It also fixes 2 bugs of PyTorch:

• Deinit order leading to access-after-delete
• Pointer passed instead of value

And some patches which should make it possible to build with 2019b for CCC 8.0 (A100) (but doesn't fully work yet)

[Flamefire]

Test report by @Flamefire
SUCCESS
Build succeeded for 1 out of 1 (1 easyconfigs in total)
taurusa6 - Linux centos linux 7.7.1908, x86_64, Intel(R) Xeon(R) CPU E5-2603 v4 @ 1.70GHz (broadwell), Python 2.7.5
See https://gist.github.com/0fd323fba9a5d0d4fa317956e2301ac7 for a full test report.

[branfosj]

Test report by @branfosj
SUCCESS
Build succeeded for 1 out of 1 (1 easyconfigs in total)
bear-pg0212u15b.bear.cluster - Linux centos linux 8.2.2004, x86_64, Intel(R) Xeon(R) CPU E5-2640 v4 @ 2.40GHz (broadwell), Python 3.6.8
See https://gist.github.com/0d5184683952f74746030bf7c8b20dac for a full test report.

[boegel]

Test report by @boegel
SUCCESS
Build succeeded for 1 out of 1 (1 easyconfigs in total)
node3301.joltik.os - Linux centos linux 7.9.2009, x86_64, Intel(R) Xeon(R) Gold 6242 CPU @ 2.80GHz (cascadelake), Python 3.6.8
See https://gist.github.com/55c08322f1ce4e9125f145357b520ae5 for a full test report.

[boegel]

Test report by @boegel
SUCCESS
Build succeeded for 1 out of 1 (1 easyconfigs in total)
node3507.doduo.os - Linux RHEL 8.2, x86_64, AMD EPYC 7552 48-Core Processor (zen2), Python 3.6.8
See https://gist.github.com/9b6938b4e68cfff76ff1acc4e9be42f5 for a full test report.

[boegel]

lgtm