Preserve file permissions in sedi helper

Use cat+rm instead of mv so the original file's inode and permissions
are retained. mktemp creates files with mode 600, and mv would replace
the target with those restrictive permissions.

Author: jeremy

scripts/bump-version.sh

@@ -22,7 +22,7 @@ sedi() {
   local expr="$1" file="$2"
   local tmp
   tmp=$(mktemp)
-  sed "$expr" "$file" > "$tmp" && mv "$tmp" "$file"
+  sed "$expr" "$file" > "$tmp" && cat "$tmp" > "$file" && rm "$tmp"
 }
 
 echo "Bumping version to: $VERSION"

scripts/sync-api-version.sh

@@ -21,7 +21,7 @@ sedi() {
   local expr="$1" file="$2"
   local tmp
   tmp=$(mktemp)
-  sed "$expr" "$file" > "$tmp" && mv "$tmp" "$file"
+  sed "$expr" "$file" > "$tmp" && cat "$tmp" > "$file" && rm "$tmp"
 }
 
 echo "Syncing API version: $API_VERSION"