mdadm: Disable Werror

Werror spews more warnings with gcc9, like other distros (
debian/fedora) disable Warnings as errors

Fixes

super-intel.c:696:9: error: taking address of packed member of 'struct imsm_super' may result in an unaligned pointer value [-Werror=address-of-packed-member]

(From OE-Core rev: 7ac6ac8eb8fc3c623eba0e245fd9049dc6e2dd86)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-extended/mdadm/files/debian-no-Werror.patch

@@ -0,0 +1,25 @@
+From: martin f. krafft <madduck@debian.org>
+Subject: Remove -Werror from compiler flags
+
+-Werror seems like a bad idea on released/packaged code because a toolchain
+update (introducing new warnings) could break the build. We'll let upstream
+use it to beautify the code, but remove it for out builds.
+
+Signed-off-by: martin f. krafft <madduck@debian.org>
+
+Upstream-Status: Pending
+---
+ Makefile |    2 +-
+ 1 files changed, 1 insertions(+), 1 deletions(-)
+
+--- a/Makefile
++++ b/Makefile
+@@ -48,7 +48,7 @@ endif
+ 
+ CC ?= $(CROSS_COMPILE)gcc
+ CXFLAGS ?= -ggdb
+-CWFLAGS = -Wall -Werror -Wstrict-prototypes -Wextra -Wno-unused-parameter
++CWFLAGS = -Wall -Wstrict-prototypes -Wextra -Wno-unused-parameter
+ ifdef WARN_UNUSED
+ CWFLAGS += -Wp,-D_FORTIFY_SOURCE=2 -O3
+ endif

meta/recipes-extended/mdadm/mdadm_4.1.bb

@@ -17,6 +17,7 @@ SRC_URI = "${KERNELORG_MIRROR}/linux/utils/raid/mdadm/${BPN}-${PV}.tar.xz \
            file://0001-Use-CC-to-check-for-implicit-fallthrough-warning-sup.patch \
            file://0001-Compute-abs-diff-in-a-standard-compliant-way.patch \
            file://0001-fix-gcc-8-format-truncation-warning.patch \
+           file://debian-no-Werror.patch \
 	   file://mdadm.init \
 	   file://mdmonitor.service \
            "