MSVC: Don't list all source files in an endless list
MSVC: Don't list all source files in an endless list

Instead tell MSVC to group the source files by directory.

mhp/libgit2,mingyaaaa/libgit2,iankronquist/libgit2,spraints/libgit2,leoyanggit/libgit2,chiayolin/libgit2,kissthink/libgit2,kissthink/libgit2,claudelee/libgit2,mhp/libgit2,JIghtuse/libgit2,stewid/libgit2,Aorjoa/libgit2_maked_lib,ardumont/libgit2,mcanthony/libgit2,magnus98/TEST,rcorre/libgit2,Corillian/libgit2,iankronquist/libgit2,magnus98/TEST,KTXSoftware/libgit2,leoyanggit/libgit2,sim0629/libgit2,magnus98/TEST,sygool/libgit2,iankronquist/libgit2,Corillian/libgit2,nokiddin/libgit2,mingyaaaa/libgit2,evhan/libgit2,mcanthony/libgit2,kissthink/libgit2,sygool/libgit2,Aorjoa/libgit2_maked_lib,yongthecoder/libgit2,Aorjoa/libgit2_maked_lib,ardumont/libgit2,Corillian/libgit2,mingyaaaa/libgit2,saurabhsuniljain/libgit2,yosefhackmon/libgit2,jamieleecool/ptest,mhp/libgit2,since2014/libgit2,since2014/libgit2,falqas/libgit2,Tousiph/Demo1,Tousiph/Demo1,sygool/libgit2,Snazz2001/libgit2,chiayolin/libgit2,jamieleecool/ptest,KTXSoftware/libgit2,Corillian/libgit2,yongthecoder/libgit2,MrHacky/libgit2,falqas/libgit2,mingyaaaa/libgit2,mhp/libgit2,whoisj/libgit2,nacho/libgit2,magnus98/TEST,raybrad/libit2,claudelee/libgit2,rcorre/libgit2,dleehr/libgit2,mingyaaaa/libgit2,mcanthony/libgit2,MrHacky/libgit2,jflesch/libgit2-mariadb,iankronquist/libgit2,chiayolin/libgit2,sygool/libgit2,Aorjoa/libgit2_maked_lib,yongthecoder/libgit2,magnus98/TEST,KTXSoftware/libgit2,evhan/libgit2,amyvmiwei/libgit2,t0xicCode/libgit2,KTXSoftware/libgit2,amyvmiwei/libgit2,oaastest/libgit2,maxiaoqian/libgit2,dleehr/libgit2,dleehr/libgit2,JIghtuse/libgit2,claudelee/libgit2,t0xicCode/libgit2,spraints/libgit2,yongthecoder/libgit2,falqas/libgit2,whoisj/libgit2,Snazz2001/libgit2,stewid/libgit2,oaastest/libgit2,jamieleecool/ptest,skabel/manguse,magnus98/TEST,spraints/libgit2,joshtriplett/libgit2,jflesch/libgit2-mariadb,yosefhackmon/libgit2,nacho/libgit2,linquize/libgit2,claudelee/libgit2,kenprice/libgit2,stewid/libgit2,nacho/libgit2,ardumont/libgit2,kenprice/libgit2,saurabhsuniljain/libgit2,sim0629/libgit2,iankronquist/libgit2,Tousiph/Demo1,raybrad/libit2,saurabhsuniljain/libgit2,rcorre/libgit2,joshtriplett/libgit2,zodiac/libgit2.js,Tousiph/Demo1,jeffhostetler/public_libgit2,claudelee/libgit2,leoyanggit/libgit2,mcanthony/libgit2,whoisj/libgit2,zodiac/libgit2.js,zodiac/libgit2.js,amyvmiwei/libgit2,saurabhsuniljain/libgit2,maxiaoqian/libgit2,falqas/libgit2,linquize/libgit2,yongthecoder/libgit2,jflesch/libgit2-mariadb,jflesch/libgit2-mariadb,nokiddin/libgit2,joshtriplett/libgit2,mcanthony/libgit2,since2014/libgit2,yosefhackmon/libgit2,maxiaoqian/libgit2,since2014/libgit2,jeffhostetler/public_libgit2,t0xicCode/libgit2,whoisj/libgit2,amyvmiwei/libgit2,sygool/libgit2,stewid/libgit2,linquize/libgit2,sygool/libgit2,sim0629/libgit2,kissthink/libgit2,jeffhostetler/public_libgit2,swisspol/DEMO-libgit2,linquize/libgit2,Snazz2001/libgit2,mrksrm/Mingijura,JIghtuse/libgit2,Snazz2001/libgit2,swisspol/DEMO-libgit2,t0xicCode/libgit2,oaastest/libgit2,raybrad/libit2,jflesch/libgit2-mariadb,yosefhackmon/libgit2,sim0629/libgit2,chiayolin/libgit2,linquize/libgit2,oaastest/libgit2,sim0629/libgit2,rcorre/libgit2,Snazz2001/libgit2,amyvmiwei/libgit2,mhp/libgit2,jeffhostetler/public_libgit2,joshtriplett/libgit2,Corillian/libgit2,joshtriplett/libgit2,Tousiph/Demo1,raybrad/libit2,maxiaoqian/libgit2,mrksrm/Mingijura,mcanthony/libgit2,whoisj/libgit2,since2014/libgit2,swisspol/DEMO-libgit2,swisspol/DEMO-libgit2,kenprice/libgit2,kissthink/libgit2,whoisj/libgit2,ardumont/libgit2,kenprice/libgit2,JIghtuse/libgit2,KTXSoftware/libgit2,jflesch/libgit2-mariadb,chiayolin/libgit2,stewid/libgit2,rcorre/libgit2,jeffhostetler/public_libgit2,chiayolin/libgit2,nokiddin/libgit2,spraints/libgit2,amyvmiwei/libgit2,sim0629/libgit2,skabel/manguse,kenprice/libgit2,zodiac/libgit2.js,Aorjoa/libgit2_maked_lib,JIghtuse/libgit2,MrHacky/libgit2,saurabhsuniljain/libgit2,swisspol/DEMO-libgit2,skabel/manguse,evhan/libgit2,mrksrm/Mingijura,jeffhostetler/public_libgit2,nacho/libgit2,maxiaoqian/libgit2,dleehr/libgit2,t0xicCode/libgit2,kenprice/libgit2,MrHacky/libgit2,Snazz2001/libgit2,KTXSoftware/libgit2,dleehr/libgit2,stewid/libgit2,oaastest/libgit2,Tousiph/Demo1,claudelee/libgit2,spraints/libgit2,ardumont/libgit2,skabel/manguse,MrHacky/libgit2,mingyaaaa/libgit2,skabel/manguse,mrksrm/Mingijura,yosefhackmon/libgit2,joshtriplett/libgit2,leoyanggit/libgit2,mrksrm/Mingijura,since2014/libgit2,dleehr/libgit2,yosefhackmon/libgit2,mrksrm/Mingijura,maxiaoqian/libgit2,iankronquist/libgit2,jamieleecool/ptest,MrHacky/libgit2,leoyanggit/libgit2,oaastest/libgit2,linquize/libgit2,leoyanggit/libgit2,t0xicCode/libgit2,zodiac/libgit2.js,mhp/libgit2,nokiddin/libgit2,saurabhsuniljain/libgit2,falqas/libgit2,swisspol/DEMO-libgit2,ardumont/libgit2,Corillian/libgit2,kissthink/libgit2,rcorre/libgit2,nokiddin/libgit2,falqas/libgit2,skabel/manguse,JIghtuse/libgit2,raybrad/libit2,nokiddin/libgit2,yongthecoder/libgit2,spraints/libgit2,evhan/libgit2