vendor: Update github.com/gobwas/glob to solve 1.3 build issue

GitHub-Pull-Request: https://github.com/syncthing/syncthing/pull/2996

vendor/github.com/gobwas/glob/bench.sh

@@ -1,26 +0,0 @@
-#! /bin/bash
-
-bench() {
-    filename="/tmp/$1-$2.bench"
-    if test -e "${filename}";
-    then
-        echo "Already exists ${filename}"
-    else
-        backup=`git rev-parse --abbrev-ref HEAD`
-        git checkout $1
-        echo -n "Creating ${filename}... "
-        go test ./... -run=NONE -bench=$2 > "${filename}" -benchmem
-        echo "OK"
-        git checkout ${backup}
-        sleep 5
-    fi
-}
-
-
-to=$1
-current=`git rev-parse --abbrev-ref HEAD`
-
-bench ${to} $2
-bench ${current} $2
-
-benchcmp $3 "/tmp/${to}-$2.bench" "/tmp/${current}-$2.bench"