win32: free thread-local data on thread exit
win32: free thread-local data on thread exit

leoyanggit/libgit2,stewid/libgit2,stewid/libgit2,stewid/libgit2,Corillian/libgit2,joshtriplett/libgit2,stewid/libgit2,leoyanggit/libgit2,leoyanggit/libgit2,Corillian/libgit2,joshtriplett/libgit2,joshtriplett/libgit2,leoyanggit/libgit2,joshtriplett/libgit2,stewid/libgit2,Corillian/libgit2,stewid/libgit2,leoyanggit/libgit2,leoyanggit/libgit2,Corillian/libgit2,Corillian/libgit2,joshtriplett/libgit2,joshtriplett/libgit2,Corillian/libgit2