[CMake][runtimes] Fix the variable name

[phosek]

Summary

This typo causes the llvm-lit path resolution to fail.

[beanz]

LGTM. In the future you can just commit this kind of patch without review. It definitely falls under the category of obvious good fix.

Thank you!

llvm/trunk/runtimes/CMakeLists.txt

foreach(entry ${runtimes})
 
     # Setting a variable to let sub-projects detect which other projects
     # will be included under here.
     set(HAVE_${canon_name} On)
   endforeach()
 
   set(SAFE_LLVM_BINARY_DIR ${LLVM_BINARY_DIR})
   set(SAFE_LLVM_LIBRARY_OUTPUT_INTDIR ${LLVM_LIBRARY_OUTPUT_INTDIR})
-  set(SAFE_LLVM_RUNTIMES_OUTPUT_INTDIR ${LLVM_RUNTIME_OUTPUT_INTDIR})
+  set(SAFE_LLVM_RUNTIME_OUTPUT_INTDIR ${LLVM_RUNTIME_OUTPUT_INTDIR})
 
   # We do this in two loops so that HAVE_* is set for each runtime before the
   # other runtimes are added.
   foreach(entry ${runtimes})
     get_filename_component(projName ${entry} NAME)
 
     if(LLVM_RUNTIMES_TARGET)
       if(NOT "${entry}" MATCHES "compiler-rt")