fix crosscompilations and support macos with zfs 2.0.1

[codyps]

No description provided.

[codecov]

Codecov Report

Merging #67 (b2d69e8) into master (5102416) will decrease coverage by 0.00%.
The diff coverage is 52.63%.

@@            Coverage Diff             @@
##           master      #67      +/-   ##
==========================================
- Coverage   44.05%   44.05%   -0.01%     
==========================================
  Files          12       12              
  Lines        2281     2356      +75     
==========================================
+ Hits         1005     1038      +33     
- Misses       1276     1318      +42     

Impacted Files	Coverage Δ
nvpair-sys/src/bindings.rs	32.53% <ø> (ø)
zfs-core/tests/basic.rs	86.29% <ø> (-1.26%)	⬇️
zfs-core-sys/build.rs	46.26% <44.44%> (-35.55%)	⬇️
nvpair-sys/build.rs	90.90% <92.30%> (+0.90%)	⬆️

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[codyps]

bors r+

[bors]

Build succeeded:

• check
• test (1.48.0)
• test (beta)
• test (stable)