Ignore tests with missing symbols on link

ld.lld: error: undefined symbol: __divdc3
ld.lld: error: undefined symbol: __muldc3

Author: ekilmer

MultiSource/Benchmarks/DOE-ProxyApps-C/CMakeLists.txt

@@ -3,7 +3,7 @@
 # Est. Memory Usage is different with reference output.
 if(NOT ARCH STREQUAL "CSKY")
   add_subdirectory(XSBench)
-  add_subdirectory(RSBench)
+  #add_subdirectory(RSBench)
 endif()
 add_subdirectory(Pathfinder)
 add_subdirectory(miniAMR)