Fix visibility of transaction symbol
Fix visibility of transaction symbol

Transaction.c did not include the visibility definition of its symbol
(that are in git2/transaction.h) and so was by default hidden.

yongthecoder/libgit2,JIghtuse/libgit2,magnus98/TEST,ardumont/libgit2,kissthink/libgit2,sim0629/libgit2,dleehr/libgit2,yongthecoder/libgit2,spraints/libgit2,t0xicCode/libgit2,KTXSoftware/libgit2,t0xicCode/libgit2,joshtriplett/libgit2,mhp/libgit2,mhp/libgit2,leoyanggit/libgit2,Tousiph/Demo1,ardumont/libgit2,jeffhostetler/public_libgit2,jeffhostetler/public_libgit2,kissthink/libgit2,since2014/libgit2,ardumont/libgit2,sygool/libgit2,yongthecoder/libgit2,mrksrm/Mingijura,oaastest/libgit2,sygool/libgit2,yongthecoder/libgit2,Corillian/libgit2,saurabhsuniljain/libgit2,mingyaaaa/libgit2,sim0629/libgit2,saurabhsuniljain/libgit2,leoyanggit/libgit2,oaastest/libgit2,yosefhackmon/libgit2,claudelee/libgit2,Tousiph/Demo1,yosefhackmon/libgit2,mcanthony/libgit2,t0xicCode/libgit2,linquize/libgit2,mcanthony/libgit2,sygool/libgit2,oaastest/libgit2,mingyaaaa/libgit2,nokiddin/libgit2,magnus98/TEST,magnus98/TEST,leoyanggit/libgit2,mcanthony/libgit2,mhp/libgit2,JIghtuse/libgit2,claudelee/libgit2,KTXSoftware/libgit2,mhp/libgit2,MrHacky/libgit2,mingyaaaa/libgit2,t0xicCode/libgit2,kissthink/libgit2,mcanthony/libgit2,mingyaaaa/libgit2,joshtriplett/libgit2,MrHacky/libgit2,Corillian/libgit2,skabel/manguse,skabel/manguse,stewid/libgit2,claudelee/libgit2,jeffhostetler/public_libgit2,sygool/libgit2,Tousiph/Demo1,KTXSoftware/libgit2,jeffhostetler/public_libgit2,nokiddin/libgit2,since2014/libgit2,falqas/libgit2,kissthink/libgit2,Tousiph/Demo1,oaastest/libgit2,dleehr/libgit2,nokiddin/libgit2,JIghtuse/libgit2,yongthecoder/libgit2,kenprice/libgit2,leoyanggit/libgit2,mrksrm/Mingijura,spraints/libgit2,linquize/libgit2,iankronquist/libgit2,Tousiph/Demo1,linquize/libgit2,mingyaaaa/libgit2,yosefhackmon/libgit2,mrksrm/Mingijura,sim0629/libgit2,yosefhackmon/libgit2,KTXSoftware/libgit2,claudelee/libgit2,JIghtuse/libgit2,linquize/libgit2,mcanthony/libgit2,yosefhackmon/libgit2,saurabhsuniljain/libgit2,sim0629/libgit2,MrHacky/libgit2,sim0629/libgit2,JIghtuse/libgit2,mrksrm/Mingijura,leoyanggit/libgit2,since2014/libgit2,MrHacky/libgit2,joshtriplett/libgit2,stewid/libgit2,dleehr/libgit2,MrHacky/libgit2,JIghtuse/libgit2,spraints/libgit2,dleehr/libgit2,skabel/manguse,kenprice/libgit2,mhp/libgit2,joshtriplett/libgit2,falqas/libgit2,since2014/libgit2,falqas/libgit2,magnus98/TEST,ardumont/libgit2,yongthecoder/libgit2,ardumont/libgit2,since2014/libgit2,spraints/libgit2,skabel/manguse,iankronquist/libgit2,mcanthony/libgit2,sim0629/libgit2,Corillian/libgit2,claudelee/libgit2,saurabhsuniljain/libgit2,t0xicCode/libgit2,jeffhostetler/public_libgit2,mhp/libgit2,nokiddin/libgit2,saurabhsuniljain/libgit2,sygool/libgit2,linquize/libgit2,nokiddin/libgit2,jeffhostetler/public_libgit2,falqas/libgit2,kissthink/libgit2,magnus98/TEST,dleehr/libgit2,KTXSoftware/libgit2,dleehr/libgit2,KTXSoftware/libgit2,iankronquist/libgit2,falqas/libgit2,mingyaaaa/libgit2,spraints/libgit2,kenprice/libgit2,kenprice/libgit2,kenprice/libgit2,iankronquist/libgit2,ardumont/libgit2,leoyanggit/libgit2,MrHacky/libgit2,stewid/libgit2,skabel/manguse,saurabhsuniljain/libgit2,kenprice/libgit2,yosefhackmon/libgit2,oaastest/libgit2,mrksrm/Mingijura,claudelee/libgit2,stewid/libgit2,t0xicCode/libgit2,mrksrm/Mingijura,oaastest/libgit2,Corillian/libgit2,falqas/libgit2,iankronquist/libgit2,Corillian/libgit2,joshtriplett/libgit2,sygool/libgit2,kissthink/libgit2,joshtriplett/libgit2,stewid/libgit2,stewid/libgit2,spraints/libgit2,Corillian/libgit2,linquize/libgit2,since2014/libgit2,magnus98/TEST,iankronquist/libgit2,Tousiph/Demo1,nokiddin/libgit2,skabel/manguse