Expose section offsets

[mkroening]

Access to section offsets is necessary for debugging (#164).

[codecov]

Codecov Report

Merging #188 (269d4da) into master (4115924) will decrease coverage by 0.03%.
The diff coverage is 12.50%.

@@            Coverage Diff             @@
##           master     #188      +/-   ##
==========================================
- Coverage   30.76%   30.72%   -0.04%     
==========================================
  Files          16       16              
  Lines        4018     4026       +8     
==========================================
+ Hits         1236     1237       +1     
- Misses       2782     2789       +7     

Impacted Files	Coverage Δ
src/vm.rs	28.30% <0.00%> (-0.05%)	⬇️
src/linux/uhyve.rs	52.88% <14.28%> (-0.89%)	⬇️

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[stlankes]

bors r+

[bors]

Build succeeded:

• Build (macos-latest)
• Build (ubuntu-latest)
• Cargo tests (macos-latest)
• Cargo tests (ubuntu-latest)
• Clippy
• Format
• KVM Tests
• Rusty-Hermit Kernel based integration tests