[pygi] Use bash explicitely in the pre-commit hook.

[Steve Frécinaux <sfre src gnome org>]

commit b435319fe830a909cc4d414533b3b66574931e24
Author: Steve Frécinaux <code istique net>
Date:   Mon Jun 7 09:54:06 2010 +0200

    Use bash explicitely in the pre-commit hook.
    
    The "builtin" command is not available in all sh flavours, so the
    pre-commit hook is going to fail if you use dash or others instead of
    bash as your default 'sh' alias.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=620805

 pre-commit.hook |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/pre-commit.hook b/pre-commit.hook
index 6eafd52..1397933 100755
--- a/pre-commit.hook
+++ b/pre-commit.hook
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 #
 # Check that the code follows a consistant code style
 #