Include the <root>/cpu/ dir in GDB releases

This directory contains some files that are used to generate some
of the files included in the GDB release, and thus must be part of
the GDB release also.

ChangeLog:

        * src-release (GDB_SUPPORT_DIRS): Add 'cpu'.

ChangeLog

@@ -1,3 +1,7 @@
+2011-08-19  Joel Brobecker  <brobecker@adacore.com>
+
+	* src-release (GDB_SUPPORT_DIRS): Add 'cpu'.
+
 2011-08-14  Yao Qi  <yao@codesourcery.com>
 
 	Merge from gcc:

src-release

@@ -269,7 +269,7 @@ gnats.tar.bz2: $(DIST_SUPPORT) $(GNATS_SUPPORT_DIRS) gnats
 		SUPPORT_FILES="$(GNATS_SUPPORT_DIRS)"
 
 .PHONY: gdb.tar.bz2
-GDB_SUPPORT_DIRS= bfd include libiberty opcodes readline sim intl libdecnumber
+GDB_SUPPORT_DIRS= bfd include libiberty opcodes readline sim intl libdecnumber cpu
 gdb.tar.bz2: $(DIST_SUPPORT) $(GDB_SUPPORT_DIRS) gdb
 	$(MAKE) -f $(SELF) gdb-taz TOOL=gdb \
 		MD5PROG="$(MD5PROG)" \