git-gui: Assume `blame --incremental` output is in UTF-8
-rwxr-xr-x 1813 GIT-VERSION-GEN
-rw-r--r-- 11322 Makefile
-rwxr-xr-x 82242 git-gui.sh
drwxr-xr-x - lib
drwxr-xr-x - macosx
drwxr-xr-x - po
drwxr-xr-x - windows