abi/bootstrap: update libabigail to latest mm-next

In this release:
 - consolidation with origin/master
 - bug fixes

Bug: 160554044
Bug: 162453121
Signed-off-by: Matthias Maennich <maennich@google.com>
Change-Id: I3458a310c4597e66a675a909eb8702c02d3d2392
diff --git a/abi/bootstrap b/abi/bootstrap
index d209e53..d1794d1 100755
--- a/abi/bootstrap
+++ b/abi/bootstrap
@@ -15,7 +15,7 @@
 # limitations under the License.
 
 ELFUTILS_VERSION=elfutils-0.180
-ABIGAIL_VERSION=ae350b3d
+ABIGAIL_VERSION=189f8bff
 
 NUM_CORES=$(cat /proc/cpuinfo | grep -c proc)
 BASE_DIR=$(readlink -f $(dirname $0))