Add support for the more standard LIB_INSTALL_DIR variable
Add support for the more standard LIB_INSTALL_DIR variable

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