Add ppc64le support

[svghadi]

Signed-off-by: Siddhesh Ghadi Siddhesh.Ghadi@ibm.com

Which problem is this PR solving?

• Resolves Support ppc64le architecture build #2272

Short description of the changes

• Adds ppc64le support for binaries & runs unit test on ppc64le architecture on travis-ci

[pavolloffay]

Just a single comment otherwise it looks good to me.

[codecov]

Codecov Report

Merging #2293 into master will decrease coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #2293      +/-   ##
==========================================
- Coverage   96.22%   96.21%   -0.02%     
==========================================
  Files         218      218              
  Lines       10687    10692       +5     
==========================================
+ Hits        10284    10287       +3     
- Misses        348      350       +2     
  Partials       55       55              

Impacted Files	Coverage Δ
plugin/storage/es/options.go	100.00% <100.00%> (ø)
cmd/query/app/server.go	92.20% <0.00%> (-2.60%)	⬇️
...lugin/sampling/strategystore/adaptive/processor.go	99.20% <0.00%> (-0.80%)	⬇️
cmd/query/app/static_handler.go	85.83% <0.00%> (+1.66%)	⬆️

---

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 b46738c...993fdab. Read the comment docs.

[yurishkuro]

thanks!