util.cc: Reusing windows workaround for cygwin.
util.cc: Reusing windows workaround for cygwin.

This fixes:
src/util.cc: In function 'double GetLoadAverage()':
src/util.cc:337:28: error: 'getloadavg' was not declared in this scope

pck/ninja,Maratyszcza/ninja-pypi,sgraham/ninja,nafest/ninja,ninja-build/ninja,lizh06/ninja,Qix-/ninja,mgaunard/ninja,liukd/ninja,kissthink/ninja,tfarina/ninja,dendy/ninja,sgraham/ninja,nocnokneo/ninja,jendrikillner/ninja,rjogrady/ninja,ThiagoGarciaAlves/ninja,jimon/ninja,purcell/ninja,bmeurer/ninja,lizh06/ninja,glensc/ninja,metti/ninja,AoD314/ninja,bmeurer/ninja,Qix-/ninja,rnk/ninja,rjogrady/ninja,ctiller/ninja,pck/ninja,rnk/ninja,jimon/ninja,colincross/ninja,dorgonman/ninja,ilor/ninja,bradking/ninja,liukd/ninja,jendrikillner/ninja,TheOneRing/ninja,atetubou/ninja,nicolasdespres/ninja,autopulated/ninja,nickhutchinson/ninja,vvvrrooomm/ninja,liukd/ninja,moroten/ninja,mdempsky/ninja,ctiller/ninja,jsternberg/ninja,tfarina/ninja,yannicklm/ninja,glensc/ninja,jsternberg/ninja,lizh06/ninja,dendy/ninja,automeka/ninja,lizh06/ninja,syntheticpp/ninja,sgraham/ninja,Ju2ender/ninja,ikarienator/ninja,mgaunard/ninja,ignatenkobrain/ninja,kissthink/ninja,ignatenkobrain/ninja,kissthink/ninja,martine/ninja,rjogrady/ninja,syntheticpp/ninja,kissthink/ninja,hnney/ninja,guiquanz/ninja,atetubou/ninja,Ju2ender/ninja,drbo/ninja,Maratyszcza/ninja-pypi,fuchsia-mirror/third_party-ninja,purcell/ninja,kimgr/ninja,AoD314/ninja,Ju2ender/ninja,ThiagoGarciaAlves/ninja,nocnokneo/ninja,mohamed/ninja,kimgr/ninja,mydongistiny/ninja,colincross/ninja,vvvrrooomm/ninja,nocnokneo/ninja,atetubou/ninja,mgaunard/ninja,ignatenkobrain/ninja,nicolasdespres/ninja,ndsol/subninja,dpwright/ninja,TheOneRing/ninja,mydongistiny/ninja,ilor/ninja,pathscale/ninja,sxlin/dist_ninja,dabrahams/ninja,ninja-build/ninja,dorgonman/ninja,moroten/ninja,sxlin/dist_ninja,ignatenkobrain/ninja,dpwright/ninja,bmeurer/ninja,jhanssen/ninja,sxlin/dist_ninja,maruel/ninja,synaptek/ninja,guiquanz/ninja,Qix-/ninja,ctiller/ninja,fifoforlifo/ninja,dabrahams/ninja,martine/ninja,colincross/ninja,hnney/ninja,sorbits/ninja,ThiagoGarciaAlves/ninja,ikarienator/ninja,maruel/ninja,kimgr/ninja,hnney/ninja,mohamed/ninja,jhanssen/ninja,martine/ninja,nafest/ninja,autopulated/ninja,dendy/ninja,Maratyszcza/ninja-pypi,fuchsia-mirror/third_party-ninja,sxlin/dist_ninja,dabrahams/ninja,martine/ninja,juntalis/ninja,yannicklm/ninja,dpwright/ninja,nico/ninja,moroten/ninja,rnk/ninja,sorbits/ninja,liukd/ninja,yannicklm/ninja,drbo/ninja,glensc/ninja,sxlin/dist_ninja,colincross/ninja,bradking/ninja,jsternberg/ninja,jendrikillner/ninja,tfarina/ninja,pck/ninja,ndsol/subninja,dabrahams/ninja,TheOneRing/ninja,ndsol/subninja,bmeurer/ninja,ilor/ninja,kimgr/ninja,purcell/ninja,drbo/ninja,pathscale/ninja,atetubou/ninja,mdempsky/ninja,sorbits/ninja,jendrikillner/ninja,dorgonman/ninja,sgraham/ninja,synaptek/ninja,metti/ninja,automeka/ninja,pck/ninja,jhanssen/ninja,jhanssen/ninja,glensc/ninja,juntalis/ninja,nickhutchinson/ninja,ndsol/subninja,pathscale/ninja,moroten/ninja,vvvrrooomm/ninja,tfarina/ninja,iwadon/ninja,automeka/ninja,nicolasdespres/ninja,mohamed/ninja,nafest/ninja,iwadon/ninja,yannicklm/ninja,nico/ninja,dendy/ninja,automeka/ninja,vvvrrooomm/ninja,synaptek/ninja,fifoforlifo/ninja,TheOneRing/ninja,iwadon/ninja,hnney/ninja,Qix-/ninja,nico/ninja,AoD314/ninja,maruel/ninja,mgaunard/ninja,metti/ninja,fuchsia-mirror/third_party-ninja,sorbits/ninja,autopulated/ninja,ikarienator/ninja,ikarienator/ninja,fifoforlifo/ninja,nicolasdespres/ninja,AoD314/ninja,rjogrady/ninja,ilor/ninja,guiquanz/ninja,sxlin/dist_ninja,nickhutchinson/ninja,ninja-build/ninja,Ju2ender/ninja,syntheticpp/ninja,juntalis/ninja,mohamed/ninja,ctiller/ninja,ninja-build/ninja,mdempsky/ninja,dorgonman/ninja,nickhutchinson/ninja,rnk/ninja,mydongistiny/ninja,bradking/ninja,fifoforlifo/ninja,dpwright/ninja,juntalis/ninja,Maratyszcza/ninja-pypi,synaptek/ninja,autopulated/ninja,nocnokneo/ninja,ThiagoGarciaAlves/ninja,syntheticpp/ninja,pathscale/ninja,mydongistiny/ninja,fuchsia-mirror/third_party-ninja,bradking/ninja,sxlin/dist_ninja,nafest/ninja,jimon/ninja,maruel/ninja,metti/ninja,jimon/ninja,drbo/ninja,mdempsky/ninja,nico/ninja,jsternberg/ninja,purcell/ninja,iwadon/ninja,guiquanz/ninja