Fixed a problem in how BUILD/check_cpu handles Core 2 Duo processors.

This fixes the regression introduced in 5.1 that prevents 64 bit builds on Intel while still keeping the core2 hack operational so the cluster can build.

BUILD/check-cpu

@@ -70,6 +70,11 @@ check_cpu () {
     Alpha*EV6*)
       cpu_arg="ev6";
       ;;
+    #Core 2 Duo  
+    *Intel*Core\(TM\)2*)
+      cpu_arg="nocona"
+      core2="yes"
+      ;;
     # Intel ia32
     *Intel*Core*|*X[eE][oO][nN]*)
       # a Xeon is just another pentium4 ...
@@ -134,10 +139,6 @@ check_cpu () {
     *i386*)
       cpu_arg="i386"
       ;;
-    #Core 2 Duo  
-    *Intel*Core\(TM\)2*)
-      cpu_arg="nocona"
-      ;;
     # Intel ia64
     *Itanium*)
       cpu_arg="itanium"