tests: Fix math_fun_special test so it passes with single prec float.
tests: Fix math_fun_special test so it passes with single prec float.

ryannathans/micropython,emfcamp/micropython,Timmenem/micropython,chrisdearman/micropython,misterdanb/micropython,Timmenem/micropython,oopy/micropython,MrSurly/micropython-esp32,mianos/micropython,emfcamp/micropython,trezor/micropython,alex-robbins/micropython,toolmacher/micropython,praemdonck/micropython,tralamazza/micropython,torwag/micropython,pozetroninc/micropython,adamkh/micropython,misterdanb/micropython,jmarcelino/pycom-micropython,AriZuu/micropython,pozetroninc/micropython,mhoffma/micropython,praemdonck/micropython,TDAbboud/micropython,puuu/micropython,alex-robbins/micropython,TDAbboud/micropython,selste/micropython,drrk/micropython,adamkh/micropython,cwyark/micropython,AriZuu/micropython,dxxb/micropython,puuu/micropython,hosaka/micropython,drrk/micropython,chrisdearman/micropython,redbear/micropython,tralamazza/micropython,pramasoul/micropython,MrSurly/micropython,adamkh/micropython,MrSurly/micropython,kerneltask/micropython,adafruit/micropython,hiway/micropython,mhoffma/micropython,dinau/micropython,cwyark/micropython,deshipu/micropython,ryannathans/micropython,trezor/micropython,danicampora/micropython,turbinenreiter/micropython,tobbad/micropython,selste/micropython,danicampora/micropython,blazewicz/micropython,TDAbboud/micropython,SHA2017-badge/micropython-esp32,MrSurly/micropython-esp32,drrk/micropython,tobbad/micropython,adafruit/circuitpython,Timmenem/micropython,matthewelse/micropython,galenhz/micropython,infinnovation/micropython,Timmenem/micropython,hiway/micropython,pramasoul/micropython,turbinenreiter/micropython,ryannathans/micropython,toolmacher/micropython,Peetz0r/micropython-esp32,EcmaXp/micropython,misterdanb/micropython,matthewelse/micropython,ryannathans/micropython,dinau/micropython,hosaka/micropython,swegener/micropython,lowRISC/micropython,MrSurly/micropython,dmazzella/micropython,SHA2017-badge/micropython-esp32,mianos/micropython,pramasoul/micropython,henriknelson/micropython,lowRISC/micropython,pramasoul/micropython,pozetroninc/micropython,micropython/micropython-esp32,adafruit/micropython,danicampora/micropython,mhoffma/micropython,adafruit/micropython,lowRISC/micropython,deshipu/micropython,AriZuu/micropython,swegener/micropython,matthewelse/micropython,cwyark/micropython,dinau/micropython,lowRISC/micropython,pfalcon/micropython,drrk/micropython,infinnovation/micropython,alex-robbins/micropython,EcmaXp/micropython,mpalomer/micropython,PappaPeppar/micropython,infinnovation/micropython,bvernoux/micropython,PappaPeppar/micropython,MrSurly/micropython,drrk/micropython,trezor/micropython,bvernoux/micropython,ganshun666/micropython,MrSurly/micropython-esp32,PappaPeppar/micropython,torwag/micropython,oopy/micropython,oopy/micropython,alex-march/micropython,mhoffma/micropython,danicampora/micropython,galenhz/micropython,toolmacher/micropython,bvernoux/micropython,mianos/micropython,dxxb/micropython,henriknelson/micropython,mpalomer/micropython,mianos/micropython,mpalomer/micropython,Peetz0r/micropython-esp32,swegener/micropython,kerneltask/micropython,adafruit/circuitpython,hiway/micropython,Peetz0r/micropython-esp32,emfcamp/micropython,oopy/micropython,redbear/micropython,henriknelson/micropython,blazewicz/micropython,tralamazza/micropython,ganshun666/micropython,hosaka/micropython,torwag/micropython,alex-robbins/micropython,dmazzella/micropython,AriZuu/micropython,EcmaXp/micropython,cwyark/micropython,pozetroninc/micropython,tuc-osg/micropython,SHA2017-badge/micropython-esp32,tuc-osg/micropython,pfalcon/micropython,bvernoux/micropython,tobbad/micropython,supergis/micropython,puuu/micropython,adafruit/micropython,praemdonck/micropython,pozetroninc/micropython,tuc-osg/micropython,toolmacher/micropython,supergis/micropython,EcmaXp/micropython,jmarcelino/pycom-micropython,jmarcelino/pycom-micropython,tuc-osg/micropython,trezor/micropython,matthewelse/micropython,matthewelse/micropython,deshipu/micropython,dinau/micropython,jmarcelino/pycom-micropython,hosaka/micropython,PappaPeppar/micropython,mpalomer/micropython,jmarcelino/pycom-micropython,PappaPeppar/micropython,MrSurly/micropython,selste/micropython,turbinenreiter/micropython,galenhz/micropython,tobbad/micropython,adamkh/micropython,dmazzella/micropython,chrisdearman/micropython,TDAbboud/micropython,infinnovation/micropython,dmazzella/micropython,alex-robbins/micropython,cwyark/micropython,adafruit/circuitpython,AriZuu/micropython,HenrikSolver/micropython,supergis/micropython,deshipu/micropython,Peetz0r/micropython-esp32,emfcamp/micropython,EcmaXp/micropython,micropython/micropython-esp32,deshipu/micropython,redbear/micropython,mpalomer/micropython,praemdonck/micropython,henriknelson/micropython,tobbad/micropython,tralamazza/micropython,dxxb/micropython,kerneltask/micropython,dinau/micropython,micropython/micropython-esp32,adafruit/circuitpython,adafruit/circuitpython,turbinenreiter/micropython,selste/micropython,pfalcon/micropython,ryannathans/micropython,blazewicz/micropython,supergis/micropython,henriknelson/micropython,selst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