[boost] build.sh bug for solaris

there is a bug in build.sh for jam for solaris "change: to build.sh if test -r /opt/SUNWspro/bin/cc ; then BOOST_JAM_TOOLSET_ROOT=/opt/SUNWspro/ fi if test -r $BOOST_JAM_TOOLSET_ROOT/bin/cc ; then PATH=$BOOST_JAM_TOOLSET_ROOT/bin:$PATH export PATH fi