Update libgit2 (#642)

Author: ehuss

libgit2-sys/build.rs

@@ -78,6 +78,7 @@ fn main() {
     // when when COMPILE_PCRE8 is not defined, which is the default.
     add_c_files(&mut cfg, "libgit2/deps/pcre");
 
+    cfg.file("libgit2/src/allocators/failalloc.c");
     cfg.file("libgit2/src/allocators/stdalloc.c");
 
     if windows {

libgit2-sys/lib.rs

@@ -456,6 +456,9 @@ pub struct git_cert_hostkey {
     pub hash_md5: [u8; 16],
     pub hash_sha1: [u8; 20],
     pub hash_sha256: [u8; 32],
+    pub raw_type: git_cert_ssh_raw_type_t,
+    pub hostkey: *const c_char,
+    pub hostkey_len: size_t,
 }
 
 #[repr(C)]
@@ -473,6 +476,14 @@ git_enum! {
     }
 }
 
+git_enum! {
+    pub enum git_cert_ssh_raw_type_t {
+        GIT_CERT_SSH_RAW_TYPE_UNKNOWN = 0,
+        GIT_CERT_SSH_RAW_TYPE_RSA = 1,
+        GIT_CERT_SSH_RAW_TYPE_DSS = 2,
+    }
+}
+
 git_enum! {
     pub enum git_diff_flag_t {
         GIT_DIFF_FLAG_BINARY     = 1 << 0,