main/libphonenumber: pkgrel bump

Rebuild libphonenumber, because a soname it depends upon does not exist
anymore: so:libboost_system-mt.so.1.66.0

aports/main/libphonenumber/APKBUILD

@@ -2,7 +2,7 @@
 # Maintainer: Bhushan Shah <bshah@kde.org>
 pkgname=libphonenumber
 pkgver=8.9.6
-pkgrel=0
+pkgrel=1
 pkgdesc="Library for parsing, formatting, and validating international phone numbers."
 url="https://github.com/googlei18n/libphonenumber"
 arch="all"