system/bc: add -lang subpackage

system/bc/APKBUILD

@@ -9,7 +9,7 @@ arch="all"
 license="BSD-2-Clause"
 depends=""
 makedepends=""
-subpackages="$pkgname-doc"
+subpackages="$pkgname-doc $pkgname-lang"
 source="https://github.com/gavinhoward/bc/releases/download/${pkgver/_/-}/bc-${pkgver/_/-}.tar.xz"
 builddir="$srcdir"/$pkgname-${pkgver/_/-}