when compile rocksdb disable tcmalloc by default

[giskook]

• Targeted PR against correct branch (see CONTRIBUTING.md)

• [ ] Linked to github-issue with discussion and accepted design OR link to spec that describes this work.

• [ ] Wrote tests

• [ ] Updated relevant documentation (docs/)

• [ ] Added a relevant changelog entry to the Unreleased section in CHANGELOG.md

• [ ] Reviewed Files changed in the github PR explorer

---

For Admin Use:

• Added appropriate labels to PR (ex. wip, ready-for-review, docs)
• Reviewers Assigned
• Squashed all commits, uses message "Merge PR #XYZ: [title]" (coding standards)

[codecov-commenter]

Codecov Report

Merging #3156 (c4286b8) into dev (d8fa8bb) will increase coverage by 0.00%. The diff coverage is n/a.

:exclamation: Current head c4286b8 differs from pull request most recent head de0d839. Consider uploading reports for the commit de0d839 to get more accurate results

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@@           Coverage Diff           @@
##              dev    #3156   +/-   ##
=======================================
  Coverage   36.56%   36.56%           
=======================================
  Files         442      442           
  Lines       46419    46419           
=======================================
+ Hits        16972    16974    +2     
+ Misses      28187    28186    -1     
+ Partials     1260     1259    -1     

see 1 file with indirect coverage changes