Fix -Wunused-result warning for chdir on linux.
Fix -Wunused-result warning for chdir on linux.

kissthink/ninja,Qix-/ninja,lizh06/ninja,lizh06/ninja,AoD314/ninja,moroten/ninja,Maratyszcza/ninja-pypi,AoD314/ninja,vvvrrooomm/ninja,juntalis/ninja,jendrikillner/ninja,sxlin/dist_ninja,bmeurer/ninja,iwadon/ninja,mohamed/ninja,guiquanz/ninja,ndsol/subninja,automeka/ninja,tfarina/ninja,metti/ninja,ninja-build/ninja,jimon/ninja,mgaunard/ninja,mgaunard/ninja,colincross/ninja,maruel/ninja,autopulated/ninja,nico/ninja,colincross/ninja,synaptek/ninja,automeka/ninja,mydongistiny/ninja,colincross/ninja,iwadon/ninja,ninja-build/ninja,ndsol/subninja,guiquanz/ninja,rjogrady/ninja,Qix-/ninja,Maratyszcza/ninja-pypi,dorgonman/ninja,iwadon/ninja,mydongistiny/ninja,juntalis/ninja,autopulated/ninja,Ju2ender/ninja,mohamed/ninja,ninja-build/ninja,nico/ninja,rjogrady/ninja,Maratyszcza/ninja-pypi,syntheticpp/ninja,ctiller/ninja,nafest/ninja,ignatenkobrain/ninja,sgraham/ninja,bmeurer/ninja,ilor/ninja,nafest/ninja,tfarina/ninja,nafest/ninja,bradking/ninja,Ju2ender/ninja,automeka/ninja,ninja-build/ninja,nicolasdespres/ninja,ilor/ninja,hnney/ninja,ctiller/ninja,kissthink/ninja,mgaunard/ninja,fuchsia-mirror/third_party-ninja,hnney/ninja,vvvrrooomm/ninja,metti/ninja,tfarina/ninja,ignatenkobrain/ninja,ThiagoGarciaAlves/ninja,liukd/ninja,moroten/ninja,guiquanz/ninja,ilor/ninja,juntalis/ninja,mgaunard/ninja,ctiller/ninja,synaptek/ninja,sxlin/dist_ninja,hnney/ninja,bmeurer/ninja,mohamed/ninja,maruel/ninja,dendy/ninja,martine/ninja,ThiagoGarciaAlves/ninja,nicolasdespres/ninja,ndsol/subninja,moroten/ninja,jendrikillner/ninja,atetubou/ninja,AoD314/ninja,kissthink/ninja,nafest/ninja,sxlin/dist_ninja,Qix-/ninja,sxlin/dist_ninja,ThiagoGarciaAlves/ninja,martine/ninja,Ju2ender/ninja,mohamed/ninja,ctiller/ninja,martine/ninja,syntheticpp/ninja,jimon/ninja,fuchsia-mirror/third_party-ninja,synaptek/ninja,dorgonman/ninja,vvvrrooomm/ninja,nico/ninja,nicolasdespres/ninja,syntheticpp/ninja,colincross/ninja,rjogrady/ninja,bradking/ninja,sgraham/ninja,sxlin/dist_ninja,guiquanz/ninja,ThiagoGarciaAlves/ninja,hnney/ninja,automeka/ninja,autopulated/ninja,syntheticpp/ninja,maruel/ninja,nico/ninja,dendy/ninja,liukd/ninja,dendy/ninja,atetubou/ninja,ignatenkobrain/ninja,synaptek/ninja,bradking/ninja,iwadon/ninja,Ju2ender/ninja,metti/ninja,tfarina/ninja,fuchsia-mirror/third_party-ninja,metti/ninja,atetubou/ninja,fuchsia-mirror/third_party-ninja,ignatenkobrain/ninja,mydongistiny/ninja,martine/ninja,liukd/ninja,lizh06/ninja,lizh06/ninja,Maratyszcza/ninja-pypi,juntalis/ninja,sgraham/ninja,maruel/ninja,atetubou/ninja,bradking/ninja,jimon/ninja,bmeurer/ninja,AoD314/ninja,ilor/ninja,sgraham/ninja,sxlin/dist_ninja,ndsol/subninja,jendrikillner/ninja,rjogrady/ninja,moroten/ninja,mydongistiny/ninja,kissthink/ninja,nicolasdespres/ninja,autopulated/ninja,vvvrrooomm/ninja,liukd/ninja,dorgonman/ninja,jimon/ninja,sxlin/dist_ninja,jendrikillner/ninja,dorgonman/ninja,Qix-/ninja,dendy/ninja