doc: minor improvements in BUILDING.md

1. necessarily reliably => necessarily reliable
2. projects root directory => project's root directory
3. remove console highlighting, as test alone is highlighted
4. fix broken link for Android NDK
5. highlight the directory location /usr/local/ssl/fips-2.0
6. remove expected output for process.versions.openssl as the version displayed is not mentioned in the document

Checklist

• documentation is changed or added
• commit message follows commit guidelines

Affected core subsystem(s)

doc

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cc @mhdawson