[Build] Remove the additional space character in the mirrors.list file (#13812) (#13904)

Author: mssonicbld

src/sonic-build-hooks/scripts/buildinfo_base.sh

@@ -71,15 +71,15 @@ check_if_url_exist()
 set_reproducible_mirrors()
 {
     # Remove the charater # in front of the line if matched
-    local expression="s/^#\(.*$REPR_MIRROR_URL_PATTERN\)/\1/"
+    local expression="s/^#\s*\(.*$REPR_MIRROR_URL_PATTERN\)/\1/"
     # Add the character # in front of the line, if not match the URL pattern condition
     local expression2="/^#*deb.*$REPR_MIRROR_URL_PATTERN/! s/^#*deb/#&/"
     local expression3="\$a#SET_REPR_MIRRORS"
     if [ "$1" = "-d" ]; then
         # Add the charater # in front of the line if match
         expression="s/^deb.*$REPR_MIRROR_URL_PATTERN/#\0/"
         # Remove the character # in front of the line, if not match the URL pattern condition
-        expression2="/^#*deb.*$REPR_MIRROR_URL_PATTERN/! s/^#(#*deb)/\1/"
+        expression2="/^#*deb.*$REPR_MIRROR_URL_PATTERN/! s/^#\s*(#*deb)/\1/"
         expression3="/#SET_REPR_MIRRORS/d"
     fi