testing/gost: update go.{mod/sum} to support loongarch64

loongarch64 build encountered the error:

# github.com/templexxx/cpu
../go-mod/github.com/templexxx/cpu@v0.1.0/cpu.go:93:14: undefined array length CacheLineSize or missing type constraint
../go-mod/github.com/templexxx/cpu@v0.1.0/cpu.go:105:14: undefined array length CacheLineSize or missing type constraint
>>> ERROR: gost: build failed
>>> gost: Uninstalling dependencies...

The latest tag of the dependency library github.com/templexxx/cpu has already added support for this architecture.And the upstream MR has not been merged yet.

testing/gost/APKBUILD

@@ -2,17 +2,17 @@
 # Maintainer: Meng Zhuo <mengzhuo@iscas.ac.cn>
 pkgname=gost
 pkgver=2.12.0
-pkgrel=2
+pkgrel=3
 pkgdesc="GO Simple Tunnel - a simple tunnel written in golang"
 url="https://github.com/ginuerzh/gost"
-# loongarch64: github.com/templexxx/cpu not support loongarch64
-arch="all !loongarch64"
+arch="all"
 license="MIT"
 makedepends="go"
 options="net" # go build requires
 subpackages="$pkgname-doc"
 
-source="$pkgname-$pkgver.tar.gz::https://github.com/ginuerzh/gost/archive/refs/tags/v$pkgver.tar.gz"
+source="$pkgname-$pkgver.tar.gz::https://github.com/ginuerzh/gost/archive/refs/tags/v$pkgver.tar.gz
+	update-go-mod.patch"
 
 export GOCACHE="${GOCACHE:-"$srcdir/go-cache"}"
 export GOMODCACHE="${GOMODCACHE:-"$srcdir/go-mod"}"
@@ -36,4 +36,5 @@ package() {
 
 sha512sums="
 609f963161c24e789a8fbe3026a8c1a07cf27d1274296cf8c75e53367948bd7381e60f31352af620f828d25a7a0d7df195316a7a7ebbef35557da463f1810124  gost-2.12.0.tar.gz
+c95c7ddb21cbdee6a73963d5100cfbf21c08a36cea1d6fcf17dc98c6e221ae90304da639661681d7e4bb4e67f93e89ecf4050c9193037d2e5dda6388cf38d7ed  update-go-mod.patch
 "