Add some hooks to automatically rebuild packages as needed

Note that to make these work, you'll have to manually

$ cd .git/hooks && ln -s ../../.hooks/* .

Signed-off-by: Keith Packard <keithp@keithp.com>

diff --git a/.hooks/post-checkout b/.hooks/post-checkout
new file mode 100755 (executable)
index 0000000..8c96b33
--- /dev/null
+++ b/.hooks/post-checkout
@@ -0,0 +1,3 @@
+#!/bin/sh
+
+cd packages && make

diff --git a/.hooks/post-merge b/.hooks/post-merge
new file mode 100755 (executable)
index 0000000..d94626a
--- /dev/null
+++ b/.hooks/post-merge
@@ -0,0 +1,3 @@
+#!/bin/sh
+
+exec .hooks/post-checkout