Add a local .gitignore file for tools/pygrub.

As at least on some systems (e.g. OpenSUSE Leap 15.5) the build will
produce a tools/pygrub/pygrub.egg-info directory, add it to the new
.gitignore file, too.

Use "/dir/" as pattern for ignoring a directory and its contents, as
the "/dir/*" pattern won't ignore the directory itself (git just
doesn't complain when seeing a directory without any not ignored file
in it).

Signed-off-by: Juergen Gross <jgross@suse.com>
---
 .gitignore              | 1 -
 tools/pygrub/.gitignore | 2 ++
 2 files changed, 2 insertions(+), 1 deletion(-)
 create mode 100644 tools/pygrub/.gitignore

diff --git a/.gitignore b/.gitignore
index 2cea994934..3009545af2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -213,7 +213,6 @@ tools/misc/xencov
 tools/pkg-config/*
 tools/qemu-xen-build
 tools/xentrace/xenalyze
-tools/pygrub/build/*
 tools/python/build/*
 tools/tests/depriv/depriv-fd-checker
 tools/tests/x86_emulator/*.bin
diff --git a/tools/pygrub/.gitignore b/tools/pygrub/.gitignore
new file mode 100644
index 0000000000..4fdf23ed8e
--- /dev/null
+++ b/tools/pygrub/.gitignore
@@ -0,0 +1,2 @@
+/build/
+/pygrub.egg-info/
-- 
2.35.3