sci-mathematics/rw: new revision to fix the build.

sci-mathematics/rw: new revision to fix the build.

No good deed goes unpunished! The recent version bump that contained
only "minor build system and documentation fixes" broke the build. The
upstream v0.8 tarball contains symlinks to various important files
instead of the files themselves, and that doesn't always work. Instead,
we now run eautoreconf in src_prepare() to (re)generate those files.

Closes: https://bugs.gentoo.org/696986
Package-Manager: Portage-2.3.76, Repoman-2.3.16
Signed-off-by: Michael Orlitzky <mjo@gentoo.org>