build_environment: add Linux-specific environment variables

[maxim-belkin]

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supersedes #3341

Add Linux-specific environment variables to build_env_keys method:

• LD_LIBRARY_PATH
• LD_RUN_PATH
• LD_PRELOAD
• LIBRARY_PATH

CC @sjackman @MikeMcQuaid

[MikeMcQuaid]

Thanks again @maxim-belkin (and @sjackman for input)