Use the right env variable for .bash_rc

[ghost]

The variable BASH_PROF is not defined by setup_linux.sh, causing
problems when attempting to append a string to the file path that should
be in BASH_PROF, which expands to nothing.
The right variable to use is BASH_RC.

[ghost]

Tested on a fresh installation of Ubuntu 16.04

[ryanjulian]

Please make backport PRs as well

[ghost]

I did, only v2019.10 applies for this one

[codecov]

Codecov Report

Merging #560 into master will increase coverage by 0.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #560      +/-   ##
==========================================
+ Coverage   58.34%   58.37%   +0.03%     
==========================================
  Files         135      135              
  Lines        9159     9159              
  Branches     1361     1361              
==========================================
+ Hits         5344     5347       +3     
+ Misses       3431     3421      -10     
- Partials      384      391       +7

Impacted Files	Coverage Δ
garage/tf/policies/categorical_gru_policy.py	80% <0%> (ø)	⬆️
...arage/tf/samplers/off_policy_vectorized_sampler.py	71.79% <0%> (ø)	⬆️
garage/misc/krylov.py	20% <0%> (ø)	⬆️
garage/sampler/stateful_pool.py	53.78% <0%> (ø)	⬆️
garage/tf/policies/gaussian_lstm_policy.py	78.83% <0%> (ø)	⬆️
garage/tf/policies/gaussian_gru_policy.py	78.67% <0%> (ø)	⬆️
garage/tf/policies/categorical_lstm_policy.py	79.83% <0%> (ø)	⬆️
garage/misc/special.py	40.9% <0%> (+3.03%)	⬆️
.../exploration_strategies/epsilon_greedy_strategy.py	96.29% <0%> (+3.7%)	⬆️

---

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[ryanjulian]

i didn't see a backport for v2018.10?