[master] (urgent care workaround) temporarily stop building perfdhcp, which

breaks solaris buildbot due to portability of getifaddrs.

tests/tools/Makefile.am

@@ -1 +1,5 @@
-SUBDIRS = badpacket perfdhcp
+# perfdhcp uses getifaddrs, which is not a standard library and is not
+# portable (at least not exist on our Solaris buildbot).  For a short term
+# workaround we stop building it until it's resolved.
+#SUBDIRS = badpacket perfdhcp
+SUBDIRS = badpacket