package/go: bump to 1.13.6

go1.13.6 (released 2020/01/09) includes fixes to the runtime and the net/http
package.

https://github.com/golang/go/issues?q=milestone=Go1.13.6

Signed-off-by: Christian Stewart <christian@paral.in>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit 17aea508c7582bd56a541c12107032937532641c)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/go/go.hash

@@ -1,3 +1,3 @@
 # From https://golang.org/dl/
-sha256	27d356e2a0b30d9983b60a788cf225da5f914066b37a6b4f69d457ba55a626ff  go1.13.5.src.tar.gz
+sha256	aae5be954bdc40bcf8006eb77e8d8a5dde412722bc8effcdaf9772620d06420c  go1.13.6.src.tar.gz
 sha256	2d36597f7117c38b006835ae7f537487207d8ec407aa9d9980794b2030cbc067  LICENSE

package/go/go.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-GO_VERSION = 1.13.5
+GO_VERSION = 1.13.6
 GO_SITE = https://storage.googleapis.com/golang
 GO_SOURCE = go$(GO_VERSION).src.tar.gz