[BOLT] link_fdata: accept symbols with slash in the name

Summary:
Change sed separator to allow replacing symbols with slash in the name.
This is required for symbol names produced by BOLT which include
"/1" suffix.

(cherry picked from FBD31324540)

bolt/test/link_fdata.sh

@@ -7,12 +7,12 @@ mapfile -t symbols < <(nm --defined-only "$2")
 
 for line in "${symbols[@]}"; do
     val=$(echo $line | cut -d' ' -f1)
-    symname=$(echo $line | awk '{ $1=$2=""; print $0 }' | sed 's/^[ \t]*//')
+    symname=$(echo $line | awk '{ $1=$2=""; print $0 }' | sed 's|^[ \t]*||')
     if [ -z "$symname" ]; then
         continue
     fi
     if [ -z "${val##*[!0-9a-fA-F]*}" ]; then
         continue
     fi
-    sed -i -e "s/\#${symname}\#/$val/g" $3
+    sed -i -e "s|\#${symname}\#|$val|g" $3
 done