user/cflow: add check

user/cflow/APKBUILD

@@ -2,7 +2,7 @@
 # Maintainer: A. Wilcox <awilfox@adelielinux.org>
 pkgname=cflow
 pkgver=1.5
-pkgrel=0
+pkgrel=1
 pkgdesc="Chart control flow in a C program"
 url="https://www.gnu.org/software/cflow/"
 arch="all"
@@ -24,6 +24,11 @@ build() {
 	make
 }
 
+check() {
+	cd "$builddir"
+	make check
+}
+
 package() {
 	cd "$builddir"
 	make DESTDIR="$pkgdir" install