[#178] Include JVM Crash Logs in gitignore

[Eclipse-Dominator]

Fixes #178

hs_err_pid files are being generated by JVM when a fatal error occurs.

These files should not be pushed to the repository.

Let's add hs_err_pid[0-9]*.log to gitignore.

[canihasreview[bot]]

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[canihasreview[bot]]

v1

@Eclipse-Dominator submitted v1 for review.

• [v1 1/1] Add hs_err_pid log files to .gitignore

(:books: Archive)

Checkout this PR version locally

```sh git fetch https://github.com/se-edu/addressbook-level3.git refs/pr/179/1/head:BRANCHNAME ``` where `BRANCHNAME` is the name of the local branch you wish to fetch this PR to.

[codecov-commenter]

Codecov Report

Merging #179 (6eb0d19) into master (a3f7c82) will not change coverage. The diff coverage is n/a.

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@@            Coverage Diff            @@
##             master     #179   +/-   ##
=========================================
  Coverage     71.92%   71.92%           
  Complexity      399      399           
=========================================
  Files            70       70           
  Lines          1236     1236           
  Branches        127      127           
=========================================
  Hits            889      889           
  Misses          315      315           
  Partials         32       32           

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[damithc]

Thanks for the PR @Eclipse-Dominator I felt the change is simple enough to warrant a subject-only commit message, so I took the liberty of shortening it.