Tools are apparently no longer included by default. I'm attaching a patch which will allow users to optionally include xmlrpc tools.
Created attachment 168542 [details, diff] Patch to build and install tools optionally.
+*xmlrpc-c-1.18.02 (27 Apr 2009) + + 27 Apr 2009; Peter Alfredsen <loki_val@gentoo.org> + +files/xmlrpc-c-1.18.02/dumpvalue.patch, +xmlrpc-c-1.18.02.ebuild: + Install tools, bug 242154. Install abyss server, bug 251718. Fix parallel + make, bug 255440. Also, bump bug 256253. +