Add support for PS Vita (armv7-sony-vita-newlibeabihf)

[nikarh]

Fixes compilation for the target, random is provided by rust-random/getrandom#359

[briansmith]

Thanks! As soon as the CI run completes I'll merge this.

[codecov]

Codecov Report

Merging #1640 (06c3ec8) into main (f8ea782) will increase coverage by 0.02%.
Report is 36 commits behind head on main.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #1640      +/-   ##
==========================================
+ Coverage   92.21%   92.23%   +0.02%     
==========================================
  Files         127      127              
  Lines       18821    18821              
  Branches      196      196              
==========================================
+ Hits        17355    17359       +4     
+ Misses       1430     1428       -2     
+ Partials       36       34       -2     

Files Changed	Coverage Δ
src/rand.rs	100.00% <ø> (ø)

... and 2 files with indirect coverage changes

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