INSTALL.Debian: Update instructions related to package ordering.

If we install the userspace packages first, without a kernel module
present in the correct path, we get an error because package install
automatically tries to start the userspace daemons and we look for
a kernel module to load.

Installing a kernel module package first and then following it by
userspace package sounds like the correct way to do it. This change
in ordering helps my next commit.

Signed-off-by: Gurucharan Shetty <[email protected]>

INSTALL.Debian

@@ -72,12 +72,8 @@ packages.
 
 You must be superuser to install Debian packages.
 
-1. Start by installing the "openvswitch-switch" and
-   "openvswitch-common" packages.  These packages include the core
-   userspace components of the switch.
-
-2. Install an Open vSwitch kernel module.  There are multiple ways to
-   do this.  In order of increasing manual effort, these are:
+1. Start by installing an Open vSwitch kernel module.  There are multiple ways
+   to do this.  In order of increasing manual effort, these are:
 
        * Use a Linux kernel 3.3 or later, which has an integrated Open
 	 vSwitch kernel module.
@@ -113,6 +109,10 @@ You must be superuser to install Debian packages.
 
        * Build and install the kernel module by hand.
 
+2. Install the "openvswitch-switch" and "openvswitch-common" packages.
+   These packages include the core userspace components of the switch.
+
+
 Open vSwitch .deb packages not mentioned above are rarely useful.
 Please refer to their individual package descriptions to find out
 whether any of them are useful to you.