modem/ofono: Enable the test scripts (#1485)

test scripts are useful to enable/disable modem and also do ofono
related tasks, They are installed on /usr/lib/ofono/test directory and
provide much better user experience then the raw dbus-send command.

modem/ofono/APKBUILD

@@ -2,7 +2,7 @@
 pkgname=ofono
 _upstreamver=1.21
 pkgver=1.21_p20180307
-pkgrel=1
+pkgrel=2
 pkgdesc="Infrastructure for building mobile telephony (GSM/UMTS) applications"
 url="https://01.org/ofono"
 arch="all"
@@ -28,6 +28,7 @@ build() {
 		--prefix=/usr \
 		--sysconfdir=/etc \
 		--localstatedir=/var \
+		--enable-test \
 		--sbindir=/usr/sbin
 	make
 }