Possible patch for sox build failure on 10.7

[Joshua Root]

On 2017-8-13 01:12 , Ken Cunningham wrote:
>> Thank you Josh. I missed ./configure --disable-silent-libtool.
> 
> I am a bit confused about this. According to 
> <https://www.gnu.org/software/automake/manual/html_node/Automake-Silent-Rules.html>, 
> disable-silent-rules is the default.
> 
> For Automake-generated Makefiles, the user may influence the verbosity 
> at |configure| run time as well as at |make| run time:
> 
>   * Passing --enable-silent-rules to |configure| will cause build rules
>     to be less verbose; the option --disable-silent-rules will cause
>     normal verbose output.

But sox's configure.ac has:

AM_SILENT_RULES([yes])

- Josh