gcc: remove double install

Signed-off-by: David Abdurachmanov <David.Abdurachmanov@cern.ch>
openssl,openssl-bootstrap: bring back RPM_OPT_FLAGS

OpenSSL 0.9.8e requires RPM_OPT_FLAGS to compile on SLC6. Also bring
a patch RPM_OPT_FLAGS to newest OpenSSL version. Default RPM_OPT_FLAGS
flags should be "-O2 -g".

Signed-off-by: David Abdurachmanov <David.Abdurachmanov@cern.ch>