testing/php7-mongodb: rebuild against php 7.2.4

testing/php7-mongodb/APKBUILD

@@ -4,21 +4,19 @@ pkgname=php7-mongodb
 _pkgreal=mongodb
 pkgver=1.4.2
 _pkgver=${pkgver/_rc/RC}
-pkgrel=1
+pkgrel=2
 pkgdesc="PHP7 MongoDB driver"
 url="http://pecl.php.net/package/mongodb"
 arch="x86_64 armhf"
 license="PHP"
 depends="php7-json"
 makedepends="libressl-dev pcre-dev php7-dev autoconf"
-install=""
-subpackages=""
 source="http://pecl.php.net/get/$_pkgreal-$_pkgver.tgz"
 options="!check"  # tests requires additional dependencies (vagrant)
+builddir="$srcdir"/$_pkgreal-$_pkgver
 
-_builddir="$srcdir"/$_pkgreal-$_pkgver
 build() {
-	cd "$_builddir"
+	cd "$builddir"
 	phpize7
 	./configure --prefix=/usr \
 		--with-php-config=/usr/bin/php-config7
@@ -26,7 +24,7 @@ build() {
 }
 
 package() {
-	cd "$_builddir"
+	cd "$builddir"
 	make INSTALL_ROOT="$pkgdir/" install
 	install -d "$pkgdir"/etc/php7/conf.d
 	echo "extension=$_pkgreal.so" > "$pkgdir"/etc/php7/conf.d/$_pkgreal.ini