mk: Add a missing folder to the dist directory

alexcrichton · alexcrichton · commit 00204e8a83c0 · 2015-05-08T09:45:16.000-07:00
This fixes the `distcheck` target and nightly builds.
diff --git a/mk/dist.mk b/mk/dist.mk
@@ -52,6 +52,7 @@ PKG_FILES := \
       doc                                      \
       driver                                   \
       etc                                      \
+      error-index-generator                    \
       $(foreach crate,$(CRATES),lib$(crate))   \
       libcollectionstest                       \
       libcoretest                              \
