apparmor: backport a patch to fix tool paths instead of sedding

Sedding is ugly, and as upstream have already fixed this cherry-pick the patch
instead.

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>

recipes-security/AppArmor/apparmor_2.12.bb

@@ -17,6 +17,7 @@ SRC_URI = " \
 	http://archive.ubuntu.com/ubuntu/pool/main/a/${BPN}/${BPN}_${PV}.orig.tar.gz \
 	file://disable_perl_h_check.patch \
 	file://crosscompile_perl_bindings.patch \
+	file://tool-paths.patch \
 	file://apparmor.rc \
 	file://functions \
 	file://apparmor \
@@ -56,8 +57,6 @@ do_configure() {
 	libtoolize --automake -c --force
 	automake -ac
 	./configure ${CONFIGUREOPTS} ${EXTRA_OECONF}
-	sed -i -e 's#^YACC.*#YACC := bison#' ${S}/parser/Makefile
-	sed -i -e 's#^LEX.*#LEX := flex#' ${S}/parser/Makefile
 }
 
 do_compile () {

recipes-security/AppArmor/files/tool-paths.patch

@@ -0,0 +1,37 @@
+Upstream-Status: Backport
+Signed-off-by: Ross Burton <ross.burton@intel.com>
+
+From e7edd937adcbf1b3c8d38a31de5bacb2029b1965 Mon Sep 17 00:00:00 2001
+From: John Johansen <john.johansen@canonical.com>
+Date: Thu, 4 Oct 2018 23:15:28 -0700
+Subject: [PATCH] parser: fix Makefile hardcoded paths to flex and bison
+
+The hardcoded paths for flex and python can break builds on systems
+where those tools are stored in an alternate location. Use which
+to lookup where flex and bison are available.
+
+This fixes issue #4
+
+Signed-off-by: John Johansen <john.johansen@canonical.com>
+---
+ parser/Makefile | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/parser/Makefile b/parser/Makefile
+index 4d370c36..015c218d 100644
+--- a/parser/Makefile
++++ b/parser/Makefile
+@@ -27,9 +27,9 @@ INSTALL_CONFDIR=${DESTDIR}${CONFDIR}
+ LOCALEDIR=/usr/share/locale
+ MANPAGES=apparmor.d.5 apparmor.7 apparmor_parser.8 subdomain.conf.5
+ 
+-YACC	:= /usr/bin/bison
++YACC	:= bison
+ YFLAGS	:= -d
+-LEX	:= /usr/bin/flex
++LEX	:= flex
+ LEXFLAGS = -B -v
+ WARNINGS = -Wall
+ EXTRA_WARNINGS = -Wsign-compare -Wmissing-field-initializers -Wformat-security -Wunused-parameter
+-- 
+2.11.0