auto merge of #6835 : cmr/rust/clang, r=thestinger

current svn version is 3.4

Author: bors

configure

@@ -561,7 +561,7 @@ then
                       | cut -d ' ' -f 2)
 
     case $CFG_CLANG_VERSION in
-        (3.0svn | 3.0 | 3.1* | 3.2* | 3.3*)
+        (3.0svn | 3.0 | 3.1* | 3.2* | 3.3* | 3.4* )
         step_msg "found ok version of CLANG: $CFG_CLANG_VERSION"
         CFG_C_COMPILER="clang"
         ;;