Add base address offset for PIE executables

[yshui]

Fix the file name and line number in backtrace for PIE executables

[dlang-bot]

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[JinShil]

Is this a fix for https://issues.dlang.org/show_bug.cgi?id=18068?

Also, see #2172

[yshui]

@JinShil Oh no! I'm duplicating someone else's work again.

[JinShil]

@yshui, Well, given how that #2172 isn't going anywhere at the moment, feel fee to adopt it, or submit a competing PR. We need that bug fixed. cc @wilzbach

[yshui]

@JinShil What is needed to be done for #2172 ?

[JinShil]

What is needed to be done for #2172 >

I'm not quite sure. You'll have to read through the comments and see if you can obtain any information about it. @wilzbach, being the author, may be able to provide you with more information.