Fix Android build with Go 1.23.0 or later (#1166)

The `github.com/wlynxg/anet` library depends on the `//go:linkname`
linker feature [1]. However, since Go 1.23.0, the usage of
`//go:linkname` has been restricted [2]. And now it's necessary to
explicitly specify `-checklinkname=0` linker flag to use it.

[1]
https://github.com/wlynxg/anet/blob/main/README.md#how-to-build-with-go-1230-or-later
[2] https://tip.golang.org/doc/go1.23#linker

Resolves: #1165

contrib/mobile/build

@@ -7,6 +7,7 @@ set -ef
 PKGSRC=${PKGSRC:-github.com/yggdrasil-network/yggdrasil-go/src/version}
 PKGNAME=${PKGNAME:-$(sh contrib/semver/name.sh)}
 PKGVER=${PKGVER:-$(sh contrib/semver/version.sh --bare)}
+GOVER=$(go version | { read _ _ version _; echo ${version#go}; })
 
 LDFLAGS="-X $PKGSRC.buildName=$PKGNAME -X $PKGSRC.buildVersion=$PKGVER"
 ARGS="-v"
@@ -33,6 +34,15 @@ if [ ! $IOS ] && [ ! $ANDROID ]; then
   exit 1
 fi
 
+ver_le() {
+    printf "$1\n$2\n" | sort -VC
+}
+
+if [ $ANDROID ] && ver_le 1.23.0 $GOVER ; then
+    # github.com/wlynxg/anet library relies on //go:linkname
+    LDFLAGS="$LDFLAGS -checklinkname=0"
+fi
+
 if [ $IOS ]; then
   echo "Building framework for iOS"
   go get golang.org/x/mobile/bind