In r204548 the 'rm -f ldscripts' was added likely due to reading the
conditional as 'else it is a file'. That seems unlikely though and
the more likely case is just that the directory hasn't been created yet.
Because this races with ,ssother scripts, use 'mkdir -p' which is a minimal
modification vs upstream to avoid the warning of 'File exists' if another
script creates it first. This could replace the 'test -d' as well but
then it's more unneeded change to the upstream script.
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