docs/manual: reinstall target

Add reinstall target information to package-make-target.txt.

[Thomas: update to take into account the fact that we now have a
single <pkg>-reinstall target.]

Signed-off-by: Doug Kehn <rdkehn@yahoo.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

docs/manual/package-make-target.txt

@@ -69,6 +69,8 @@ graphs.
 
 | +dirclean+        | Remove the whole package build directory
 
+| +reinstall+       | Re-run the install commands
+
 | +rebuild+         | Re-run the compilation commands - this only makes
 sense when using the +OVERRIDE_SRCDIR+ feature or when you modified a file
 directly in the build directory