[PATCH] buildhistory-diff: suggest correct version of PythonGit

[Ed Bartosh <ed.bartosh@linux.intel.com>]

If buildhistory-diff can't import git module it throws error
message suggesting to install it.

Due to the move to Python 3 the suggested package name and
version became outdated.

Changed package name to python3-git and version to >= 0.3.4
as GitPython supports Python 3 starting from 0.3.4.

[YOCTO #9741]

Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com>
---
 scripts/buildhistory-diff | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/buildhistory-diff b/scripts/buildhistory-diff
index dc8b8f2..d8ca12d 100755
--- a/scripts/buildhistory-diff
+++ b/scripts/buildhistory-diff
@@ -14,7 +14,7 @@ from distutils.version import LooseVersion
 try:
     import git
 except ImportError:
-    print("Please install GitPython (python-git) 0.3.1 or later in order to use this script")
+    print("Please install GitPython (python3-git) 0.3.4 or later in order to use this script")
     sys.exit(1)
 
 def main():
-- 
2.1.4