main/talloc: include libtalloc.a on talloc-dev

Current talloc's Waf build setup doesn't include stlib feature, so we
need to build the static library manually. This library is required to
properly build the statically-linked PRoot binary on Alpine Linux.

main/talloc/APKBUILD

@@ -2,7 +2,7 @@
 # Maintainer: William Pitcock <nenolod@dereferenced.org>
 pkgname=talloc
 pkgver=2.1.14
-pkgrel=0
+pkgrel=1
 pkgdesc="Memory pool management library"
 url="https://talloc.samba.org"
 arch="all"
@@ -32,6 +32,9 @@ build() {
 		--without-gettext \
 		--extra-python=/usr/bin/python3
 	make
+
+	# talloc's Waf setup doesn't build static libraries, so we do it manually
+	ar qf libtalloc.a bin/default/talloc_*.o
 }
 
 check() {
@@ -42,6 +45,7 @@ check() {
 package() {
 	cd "$builddir"
 	make DESTDIR="$pkgdir" install
+	install -Dm644 libtalloc.a "$pkgdir"/usr/lib/libtalloc.a
 }
 
 _py2() {