linux-raspberrypi: Update 4.9 recipe to 4.9.59

Signed-off-by: Andrei Gherzan <andrei@gherzan.com>

recipes-kernel/linux/linux-raspberrypi_4.9.bb

@@ -1,8 +1,8 @@
 FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}-${PV}:"
 
-LINUX_VERSION ?= "4.9.50"
+LINUX_VERSION ?= "4.9.59"
 
-SRCREV = "46e2d4d1bd2c17e2f84dd90768321ee0bbaa6b8a"
+SRCREV = "e7976b2affa8c05bd299ead0ad9c36ddaf135b9d"
 SRC_URI = "git://github.com/raspberrypi/linux.git;branch=rpi-4.9.y"
 
 require linux-raspberrypi.inc