testing/babeltrace: Fix output plugins

abuild adds "-Wl,--as-needed" to LDFLAGS which breaks
babeltrace plugin load that uses _init functions to
initialize.

testing/babeltrace/APKBUILD

@@ -2,7 +2,7 @@
 # Maintainer: Michael Jeanson <mjeanson@efficios.com>
 pkgname=babeltrace
 pkgver=1.4.0
-pkgrel=0
+pkgrel=1
 pkgdesc="a trace converter and read/write library"
 url="https://www.efficios.com/babeltrace"
 arch="all"
@@ -18,11 +18,18 @@ builddir="$srcdir/$pkgname-$pkgver"
 
 build() {
 	cd "$builddir"
+
+	# This package uses _init functions to initialise extensions. With
+	# --as-needed this will not work.
+	export LDFLAGS="$LDFLAGS -Wl,--no-as-needed"
 	./configure \
+		--build=$CBUILD \
+		--host=$CHOST \
 		--prefix=/usr \
+		--disable-static \
 		--disable-debug-info \
 		|| return 1
-	make || return 1
+	make V=1 || return 1
 	make check || return 1
 }