[doc] install.texi, update links to packages for Solaris

[Tom G. Christensen]

As pointed out by Dagobert Michelsen:
https://gcc.gnu.org/ml/gcc/2014-07/msg00083.html

Patch applies to trunk, gcc 4.9 and gcc 4.8 branches.

2014-07-09  Tom G. Christensen  <tgc@jupiterrise.com>

	* doc/install.texi: Remove links to defunct package providers for
	Solaris

--- a/gcc/doc/install.texi
+++ b/gcc/doc/install.texi
@@ -3027,12 +3027,6 @@ OpenServer/Unixware}.
 Solaris 2 (SPARC, Intel):
 @itemize
 @item
-@uref{http://www.sunfreeware.com/,,Sunfreeware}
-
-@item
-@uref{http://www.blastwave.org/,,Blastwave}
-
-@item
 @uref{http://www.opencsw.org/,,OpenCSW}
 
 @item