Non-package Install: Consider sym-links in reloc.sh

As found in a recent customer case, when using a non-packaged install, the reloc.sh script does not handle sym-links.

In particular, the ones pointing to bin/cbc (e.g. cbc-hash), resulting in:

[~/opt/couchbase/bin]$ ls -ltr | grep cbc-hash

lrwxrwxrwx. 1 couchbase couchbase    3 Mar 25 06:17 cbc-hash -> cbc

[~/opt/couchbase/bin]$ ./cbc-hash DOC_KEY -U couchbase://localhost/BUCKET  -u Administrator -P Password

/home/couchbase/opt/couchbase/bin/cbc-hash: line 12: /home/couchbase/opt/couchbase/bin/cbc-hash.bin: No such file or directory

A workaround for the cbc sym-links is to use cbc hash (without the hyphen).

A future fix may involve skipping the reloc wrapper for these sym-links, and perhaps even dropping it more widely if possible.