tests: try git apply from subdir of toplevel
Make sure git apply can apply patches with paths relative to the
toplevel of a work tree, a subdirectory, or within the repository
metadata directory.
Relative paths are broken for most commands when run from a
subdirectory of $GIT_DIR, "git apply" being no exception. The other
tests are meant to keep the demonstration of that company.
Based on a test by Duy.
Cc: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>