Add cmake defaults for ?sum kernels

cmake/kernel.cmake

@@ -107,6 +107,12 @@ macro(SetDefaultL1)
   set(DAXPBYKERNEL ../arm/axpby.c)
   set(CAXPBYKERNEL ../arm/zaxpby.c)
   set(ZAXPBYKERNEL ../arm/zaxpby.c)
+  set(SSUMKERNEL sum.S)
+  set(DSUMKERNEL sum.S)
+  set(CSUMKERNEL zsum.S)
+  set(ZSUMKERNEL zsum.S)
+  set(QSUMKERNEL sum.S)
+  set(XSUMKERNEL zsum.S)
 endmacro ()
 
 macro(SetDefaultL2)
@@ -162,4 +168,4 @@ macro(SetDefaultL3)
   set(DGEADD_KERNEL ../generic/geadd.c)
   set(CGEADD_KERNEL ../generic/zgeadd.c)
   set(ZGEADD_KERNEL ../generic/zgeadd.c)
-endmacro ()
+endmacro ()