package/go: security bump to 1.16.15

go1.16.15 includes a security fix to the regexp/syntax package, as well as
bug fixes to the compiler, runtime, the go command, and to the net package.

https://go.dev/doc/devel/release#go1.16.minor

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/go/go.hash

@@ -1,3 +1,3 @@
 # From https://golang.org/dl/
-sha256  467898cd3a216de54dcb9014f541efe77e9b79a7154dbc1fd2dd778b0c63fb56  go1.16.14.src.tar.gz
+sha256  90a08c689279e35f3865ba510998c33a63255c36089b3ec206c912fc0568c3d3  go1.16.15.src.tar.gz
 sha256  2d36597f7117c38b006835ae7f537487207d8ec407aa9d9980794b2030cbc067  LICENSE

package/go/go.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-GO_VERSION = 1.16.14
+GO_VERSION = 1.16.15
 GO_SITE = https://storage.googleapis.com/golang
 GO_SOURCE = go$(GO_VERSION).src.tar.gz