Remove here strings bashism from riak-debug

"Here strings" are similar to "here docs", except the the former are only
supported in bash and not sh.  This converts the `read` command that used
the `<<<` here string to split the result of `config generate` to instead
do it in a few steps.

First it stores the result like:
`/Volumes/Data/Development/basho/riak/rel/riak/data/generated.configs/app.2014.06.10.14.35.54.config /Volumes/Data/Development/basho/riak/rel/riak/data/generated.configs/vm.2014.06.10.14.35.54.args` in gen_result

The next two lines simply split gen_result on a the space, as the former
here string did.

`-f 1` takes the first:
`/Volumes/Data/Development/basho/riak/rel/riak/data/generated.configs/app.2014.06.10.14.35.54.config`

`-f 2` takes the second:
`/Volumes/Data/Development/basho/riak/rel/riak/data/generated.configs/vm.2014.06.10.14.35.54.args`
Use ksh on Solaris because sh isn't really sh on Solaris 10
Merge pull request #556 from basho/jem-fix-bashisms-riak-debug

Fix solaris support of riak-debug