binutils: Add 2.20 (patchset from OE.dev)

Signed-off-by: Richard Purdie <rpurdie@linux.intel.com>

meta/packages/binutils/binutils-2.20/binutils-arm-non-empty-know.patch

@@ -0,0 +1,18 @@
+This is backported partially from 2.20 branch
+
+http://sourceware.org/ml/binutils-cvs/2009-10/msg00173.html
+
+-Khem
+Index: binutils-2.20/gas/as.h
+===================================================================
+--- binutils-2.20.orig/gas/as.h	2009-10-22 00:27:08.700469349 -0700
++++ binutils-2.20/gas/as.h	2009-10-22 00:28:04.068416318 -0700
+@@ -238,7 +238,7 @@ typedef addressT valueT;
+ #define know(p) gas_assert(p)	/* Verify our assumptions!  */
+ #endif /* not yet defined */
+ #else
+-#define know(p)			/* know() checks are no-op.ed  */
++#define know(p) do {} while (0)	/* know() checks are no-op.ed  */
+ #endif
+ 
+ /* input_scrub.c */