linux-headers: bump 3.2.x series

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/linux-headers/Config.in.host

@@ -199,7 +199,7 @@ endchoice
 
 config BR2_DEFAULT_KERNEL_HEADERS
 	string
-	default "3.2.72"	if BR2_KERNEL_HEADERS_3_2
+	default "3.2.73"	if BR2_KERNEL_HEADERS_3_2
 	default "3.4.110"	if BR2_KERNEL_HEADERS_3_4
 	default "3.10.93"	if BR2_KERNEL_HEADERS_3_10
 	default "3.12.50"	if BR2_KERNEL_HEADERS_3_12