2.x: Gradle to use less memory, missed an export command

[akarnokd]

Looks like there was a missing "export" keyword in the build options and thus gradle ate all 3 GB memory dancing on the edge of the OOMKiller.

[akarnokd]

Much better:

https://travis-ci.org/ReactiveX/RxJava/builds/246182350#L687

[codecov]

Codecov Report

Merging #5436 into 2.x will increase coverage by 0.19%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##                2.x    #5436      +/-   ##
============================================
+ Coverage     95.98%   96.17%   +0.19%     
  Complexity     5803     5803              
============================================
  Files           631      631              
  Lines         41297    41297              
  Branches       5744     5744              
============================================
+ Hits          39639    39718      +79     
+ Misses          657      605      -52     
+ Partials       1001      974      -27

Impacted Files	Coverage Δ	Complexity Δ
...vex/internal/operators/single/SingleTakeUntil.java	86.88% <0%> (-6.56%)	2% <0%> (ø)
...tivex/internal/schedulers/InstantPeriodicTask.java	61.11% <0%> (-5.56%)	7% <0%> (-2%)
.../internal/operators/maybe/MaybeTakeUntilMaybe.java	95.91% <0%> (-4.09%)	2% <0%> (ø)
...reactivex/internal/operators/single/SingleAmb.java	96.36% <0%> (-3.64%)	9% <0%> (-1%)
...vex/internal/operators/flowable/FlowableTimer.java	92.85% <0%> (-3.58%)	2% <0%> (ø)
...ternal/operators/observable/ObservablePublish.java	92.1% <0%> (-3.51%)	10% <0%> (ø)
...x/internal/operators/maybe/MaybeSwitchIfEmpty.java	97.22% <0%> (-2.78%)	2% <0%> (ø)
...rnal/operators/flowable/FlowableTakeLastTimed.java	96.29% <0%> (-2.78%)	2% <0%> (ø)
...ava/io/reactivex/internal/util/HalfSerializer.java	97.5% <0%> (-2.5%)	22% <0%> (-1%)
.../io/reactivex/internal/schedulers/IoScheduler.java	92.39% <0%> (-2.18%)	9% <0%> (ø)
... and 42 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 8adfa3f...9647aee. Read the comment docs.