fix(triangle): fix triangle build on windows with icl

[codecov[bot]]

Codecov Report

Merging #99 (f254167) into master (5b8d6bd) will decrease coverage by 12.781%. The diff coverage is n/a.

:exclamation: Current head f254167 differs from pull request most recent head baf9f9a. Consider uploading reports for the commit baf9f9a to get more accurate results

@@              Coverage Diff               @@
##            master       #99        +/-   ##
==============================================
- Coverage   65.870%   53.089%   -12.782%     
==============================================
Files           16        15         -1     
Lines         4105      4095        -10     
==============================================
- Hits          2704      2174       -530     
- Misses        1401      1921       +520     

Impacted Files	Coverage Δ
pymake/plot/dependency_graphs.py	11.627% <0.000%> (-52.326%)	:arrow_down:
pymake/utils/usgsprograms.py	36.893% <0.000%> (-46.602%)	:arrow_down:
pymake/utils/download.py	40.922% <0.000%> (-27.378%)	:arrow_down:
pymake/pymake_base.py	65.983% <0.000%> (-21.039%)	:arrow_down:
pymake/utils/_compiler_language_files.py	75.000% <0.000%> (-20.834%)	:arrow_down:
pymake/utils/_compiler_switches.py	66.367% <0.000%> (-14.126%)	:arrow_down:
pymake/utils/_usgs_src_update.py	78.510% <0.000%> (-9.456%)	:arrow_down:
pymake/utils/_Popen_wrapper.py	82.500% <0.000%> (-7.500%)	:arrow_down:
pymake/pymake_build_apps.py	78.125% <0.000%> (-4.167%)	:arrow_down:
pymake/pymake.py	72.897% <0.000%> (-2.181%)	:arrow_down:
... and 1 more