Don't use precompiled headers for command-line based VC builds.
Don't use precompiled headers for command-line based VC builds.

The reason, why libgit2 currently cannot support compiling via the command-line
tools cl/nmake from WinSDK and/or Microsoft Visual Studio, seems to be a
missing dependency on the generated precompiled header file.

The Visual Studio IDE automatically inserts this dependency when it sees the
right combination of "/Y" parameters.

This patch allows to compile using command line tools by disabling precompiled
headers for NON-IDE builds.

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