Update git to version 1.8.0.

third_party/git_bin_packager/git_bin_packager.py

Index: third_party/git_bin_packager/git_bin_packager.py
===================================================================
--- third_party/git_bin_packager/git_bin_packager.py	(revision 155765)
+++ third_party/git_bin_packager/git_bin_packager.py	(working copy)
@@ -14,7 +14,7 @@
 import urllib
 
 
-DEPOT_GIT_DIR = 'git_bin'
+DEPOT_GIT_DIR = 'git-1.8.0_bin'
 DEPOT_GIT_FILE = '%s.zip' % DEPOT_GIT_DIR
 # The Git scripts call these exes directly, so we keep them in our distribution.
 LIBEXEC_EXEMPT_LIST = [
@@ -33,7 +33,7 @@
 ]
 PORTABLE_GIT_FILE = 'portablegit.7z'
 PORTABLE_GIT_URL = (
-    'http://msysgit.googlecode.com/files/PortableGit-1.7.4-preview20110204.7z')
+    'https://msysgit.googlecode.com/files/PortableGit-1.8.0-preview20121022.7z')
 SCRIPTDIR = os.path.dirname(os.path.abspath(__file__))
 WIN32PAD_FILE = 'win32pad.zip'
 WIN32PAD_URL = 'http://www.gena01.com/win32pad/win32pad_1_5_10_4.zip'
@@ -100,7 +100,7 @@
     if GetFileSize(gitfile) == gitexe_size:
       os.system('rm %s' % gitfile)
 
-  # Move back to <tmp>/git_bin/.
+  # Move back to <tmp>/git-1.8.0_bin/.
   os.chdir('../../')
 
   # Place extra files into the archive directory.