media-sound/csound-{6.13.0,9999}: fixes

media-sound/csound-{6.13.0,9999}: fixes

1) added hdf5 use flag and related dependency (bug #703072)
2) enabled most of the cmake flags to catch other possible issues
3) fixed configuring lua library when -luajit (bug #703078)
   pkg-config --variable=libname returns empty string so in that
   case using default libname
4) 6.13.0 - removed BUILD_MP3OUT_OPCODE as that was introduced later

Closes: https://bugs.gentoo.org/703072
Closes: https://bugs.gentoo.org/703078
Package-Manager: Portage-2.3.82, Repoman-2.3.20
Signed-off-by: Miroslav Šulc <fordfrog@gentoo.org>