buildgcc: Update the toolchain patches version

acpica 20120420, acpica-unix-20110922_no_unused_variables.patch is not
used anymore.
binutils 2.22.

Change-Id: I58459bd2eba2ad752fc033e51ee0892e2e069a02
Signed-off-by: Zheng Bao <zheng.bao@amd.com>
Signed-off-by: zbao <fishbaozi@gmail.com>
Reviewed-on: http://review.coreboot.org/1424
Tested-by: build bot (Jenkins)
Reviewed-by: Anton Kochkov <anton.kochkov@gmail.com>

util/crossgcc/patches/acpica-unix-20120420_unknown_warnings.patch

@@ -0,0 +1,19 @@
+--- acpica-unix-20120420/source/compiler/Makefile	2012-04-21 04:02:33.000000000 +0800
++++ acpica-unix-20120420/source/compiler/Makefile	2012-08-08 16:30:14.000000000 +0800
+@@ -261,15 +261,11 @@
+     -Waggregate-return \
+     -Wchar-subscripts \
+     -Wempty-body \
+-    -Wlogical-op \
+     -Wmissing-declarations \
+     -Wmissing-field-initializers \
+-    -Wmissing-parameter-type \
+     -Wnested-externs \
+-    -Wold-style-declaration \
+     -Wold-style-definition \
+-    -Wredundant-decls \
+-    -Wtype-limits
++    -Wredundant-decls
+ 
+ #
+ # Bison/Flex configuration