Fix SymbolRef() ambiguity on 32-bit platforms

[staticfloat]

No description provided.

[codecov]

Codecov Report

Merging #29 (b55aabf) into master (c076117) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #29   +/-   ##
=======================================
  Coverage   70.50%   70.50%           
=======================================
  Files          45       45           
  Lines        1197     1197           
=======================================
  Hits          844      844           
  Misses        353      353           

Impacted Files	Coverage Δ
src/Abstract/Symbol.jl	94.73% <ø> (ø)
src/ELF/ELFSymbol.jl	59.32% <ø> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update c076117...b55aabf. Read the comment docs.