scons: Recognize 'AMD64' processor as well.
diff --git a/common.py b/common.py
index e794126..b74b204 100644
--- a/common.py
+++ b/common.py
@@ -30,6 +30,7 @@
 	'i586': 'x86',
 	'i686': 'x86',
 	'ppc' : 'ppc',
+	'AMD64': 'x86_64',
 	'x86_64': 'x86_64',
 }