libmad: Add a patch to pass cflags to build

Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-multimedia/libmad/libmad/0001-configure-Respect-the-cflags-from-environment.patch

@@ -0,0 +1,47 @@
+From 26342d1c775205f661f5cf005b7e054a04f5d32e Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Tue, 16 May 2023 10:14:57 -0700
+Subject: [PATCH] configure: Respect the cflags from environment
+
+This is needed with OE like cross-build envs where certain important
+flags maybe passed as global policy to aid cross compiling or
+reproducibility etc.
+
+Upstream-Status: Inappropriate [OE-Specific]
+
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+ configure.ac | 5 +----
+ 1 file changed, 1 insertion(+), 4 deletions(-)
+
+--- a/configure.ac
++++ b/configure.ac
+@@ -73,12 +73,9 @@ debug=""
+ optimize=""
+ profile=""
+ 
+-set -- $CFLAGS
+-CFLAGS=""
+-
+ if test "$GCC" = yes
+ then
+-    CFLAGS="-Wall"
++    CFLAGS="$CFLAGS -Wall"
+ fi
+ 
+ while test $# -gt 0
+@@ -115,10 +112,13 @@ do
+ 	    optimize="$optimize $1"
+ 	    shift
+ 	    ;;
+-	*)
++	-*)
+ 	    CFLAGS="$CFLAGS $1"
+ 	    shift
+ 	    ;;
++	*)
++	    shift
++	    ;;
+     esac
+ done
+ 

meta-oe/recipes-multimedia/libmad/libmad_0.15.1b.bb

@@ -16,6 +16,7 @@ SRC_URI = "ftp://ftp.mars.org/pub/mpeg/libmad-${PV}.tar.gz \
     file://fix_for_mips_with_gcc-4.5.0.patch \
     file://obsolete_automake_macros.patch \
     file://automake-foreign.patch \
+    file://0001-configure-Respect-the-cflags-from-environment.patch \
 "
 SRC_URI:append:toolchain-clang = " file://0004-Remove-clang-unsupported-compiler-flags.patch "