scripts: use generic urls for sourceforge

For expat, duma, and strace, use the generic url and 302 to the mirror
instead of trying to download a file from a downed mirror and
failing.

Signed-off-by: Bryan Hundven <bryanhundven@gmail.com>
Message-Id: <b69ebeb72fef93c04c84.1345364051@flambe.is-a-geek.org>
(transplanted from cb75966698d7e44bc76445d7b249eba89bdf1d8a)

 # m68k specific configuration file

 ## depends on EXPERIMENTAL

 ##

 ## select ARCH_SUPPORTS_32

 ## select ARCH_DEFAULT_32

 ## select ARCH_DEFAULT_BE

 ## select ARCH_SUPPORTS_WITH_CPU

 ##

 ## help The m68k architecture