linux-headers: bump 3.12.x series

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/linux-headers/Config.in.host

@@ -165,7 +165,7 @@ config BR2_DEFAULT_KERNEL_HEADERS
 	default "3.9.11"	if BR2_KERNEL_HEADERS_3_9
 	default "3.10.55"	if BR2_KERNEL_HEADERS_3_10
 	default "3.11.10"	if BR2_KERNEL_HEADERS_3_11
-	default "3.12.28"	if BR2_KERNEL_HEADERS_3_12
+	default "3.12.29"	if BR2_KERNEL_HEADERS_3_12
 	default "3.13.11"	if BR2_KERNEL_HEADERS_3_13
 	default "3.14.19"	if BR2_KERNEL_HEADERS_3_14
 	default "3.15.10"	if BR2_KERNEL_HEADERS_3_15