libid3tag: Fix reproducibility issue

Configure was swallowing our cflags meaning the resulting binaries were
not reproducible. Tweak configure not to do that and fix reproducibility.

(From OE-Core rev: d55f1632bbc6f9b7dadc874d68006d4ceb13937c)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 1395269a6fae5cec01d721e2ad52bd7cb8fc38ce)
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-multimedia/libid3tag/libid3tag/cflags_filter.patch

@@ -0,0 +1,21 @@
+configure contains CFLAGS filtering code which was removing our prefix-map
+flags. We need those to generate reproducible binaries. Allow them through.
+
+Upstream-Status: Pending
+Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
+
+Index: libid3tag-0.15.1b/configure.ac
+===================================================================
+--- libid3tag-0.15.1b.orig/configure.ac
++++ libid3tag-0.15.1b/configure.ac
+@@ -99,6 +99,10 @@ do
+ 	-mno-cygwin)
+ 	    shift
+ 	    ;;
++	-fmacro-prefix-map*|-fdebug-prefix-map*)
++	    CFLAGS="$CFLAGS $1"
++	    shift
++	    ;;
+ 	-m*)
+ 	    arch="$arch $1"
+ 	    shift

meta/recipes-multimedia/libid3tag/libid3tag_0.15.1b.bb

@@ -15,6 +15,7 @@ SRC_URI = "${SOURCEFORGE_MIRROR}/mad/libid3tag-${PV}.tar.gz \
            file://0001-Fix-gperf-3.1-incompatibility.patch \
            file://10_utf16.patch \
            file://unknown-encoding.patch \
+           file://cflags_filter.patch \
            "
 UPSTREAM_CHECK_URI = "https://sourceforge.net/projects/mad/files/libid3tag/"
 UPSTREAM_CHECK_REGEX = "/projects/mad/files/libid3tag/(?P<pver>.*)/$"