build: update zbar to fix build issue with autoconf 2.70

see https://github.com/Electron-Cash/Electron-Cash/pull/2143
see https://github.com/mchehab/zbar/issues/132

contrib/build-linux/appimage/Dockerfile

@@ -14,6 +14,7 @@ RUN apt-get update -q && \
         autotools-dev=20150820.1 \
         autoconf=2.69-9 \
         libtool=2.4.6-0.1 \
+        autopoint=0.19.7-2ubuntu3.1 \
         xz-utils=5.1.1alpha+20120614-2ubuntu2 \
         libssl-dev=1.0.2g-1ubuntu4.19 \
         libssl1.0.0=1.0.2g-1ubuntu4.19 \

contrib/make_zbar.sh

@@ -10,7 +10,7 @@
 # Or for a Windows x86_64 (64-bit) target, run:
 # $ GCC_TRIPLET_HOST="x86_64-w64-mingw32" BUILD_TYPE="wine" ./contrib/make_zbar.sh
 
-ZBAR_VERSION="d2893738411be897a04caa42ffc13d1f6107d3c6"
+ZBAR_VERSION="aac86d5f08d64ab4c3da78188eb622fa3cb07182"
 
 set -e
 

contrib/osx/make_osx

@@ -122,8 +122,10 @@ cp "$BUILDDIR/libusb/1.0.23/lib/libusb-1.0.dylib" contrib/osx
 echo "caea266f3fc3982adc55d6cb8d9bad10f6e61f0c24ce5901aa1804618e08e14d  contrib/osx/libusb-1.0.dylib" | \
     shasum -a 256 -c || fail "libusb checksum mismatched"
 
+# install some build-time deps for compilation
+brew install autoconf automake libtool gettext
+
 info "Preparing for building libsecp256k1"
-brew install autoconf automake libtool
 "$CONTRIB"/make_libsecp256k1.sh || fail "Could not build libsecp"
 cp "$ROOT_FOLDER"/electrum/libsecp256k1.0.dylib contrib/osx