libtextstyle: Turn off hyperlinks on the Solaris console.
The Solaris 11 console prints garbage when a hyperlink is output.
Tested on Solaris 11.4/x86 and Solaris 11 OmniOS/x86.
* libtextstyle/gnulib-local/lib/term-ostream.oo.c (should_enable_hyperlinks):
Return false for the Solaris console.
