7130404: [macosx] "os.arch" value should be "x86_64" for compatibility with Apple JDK6

On Mac OS X, align system property "os.arch" with Apple legacy JDKs.  Also, improve os.name string matching by using .contains() method instead of .startsWith(). This fix spans multiple repositories.

Reviewed-by: dcubed, phh, ohair, katleman

corba/make/common/shared/Platform.gmk

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -275,7 +275,7 @@ ifeq ($(PLATFORM), bsd)
                     echo sparc \
                     ;; \
                 x86_64) \
-                    echo amd64 \
+                    echo x86_64 \
                     ;; \
                 "Power Macintosh") \
                     echo ppc \
@@ -287,12 +287,13 @@ ifeq ($(PLATFORM), bsd)
   ARCH        := $(shell $(archExpr) )
   ARCH_FAMILY := $(ARCH)
 
-  # Darwin x86 builds are i386/amd64 universal.
-  ifeq ($(SYSTEM_UNAME), Darwin)
-    ifneq ($(ARCH), ppc)
-      ARCH=universal
-    endif
-  endif
+  # Darwin builds are currently universal but only include 64-bit
+  # 
+  # ifeq ($(SYSTEM_UNAME), Darwin)
+  #  ifneq ($(ARCH), ppc)
+  #    ARCH=universal
+  #  endif
+  # endif
 
   # i586, sparc, and ppc are 32 bit, amd64 and sparc64 are 64
   ifneq (,$(findstring $(ARCH), i586 sparc ppc universal))