opal_errd: try to locate extract_opal_dump when installed to non default path
opal_errd: try to locate extract_opal_dump when installed to non default path

If opal_errd is not installed in /usr/sbin then neither will
extract_opal_dump, this means that the default path for extract_opal_dump
(/usr/sbin) will be wrong and extract_opal_dump don't exist. opal_errd
should be smart enough to look for it whereever it is as these are installed
to the same place from ppc64-diag

Signed-off-by: Cyril Bur <6ce38dade8c4b52fd55c193fae70fd1d1275c3c3@au1.ibm.com>
Signed-off-by: Vasant Hegde <a6d753843573f7bfed5075c1e875b0be8007a0ab@linux.vnet.ibm.com>

leitao/ppc64-diag,leitao/ppc64-diag,leitao/ppc64-diag,leitao/ppc64-diag