gnucobol: add missing -devel subpkg

I somehow missed that part when merging the PR #11192

srcpkgs/gnucobol-libs

@@ -0,0 +1 @@
+gnucobol

srcpkgs/gnucobol/template

@@ -1,7 +1,7 @@
 # Template file for 'gnucobol'
 pkgname=gnucobol
 version=2.2
-revision=1
+revision=2
 build_style=gnu-configure
 makedepends="gmp-devel db-devel"
 short_desc="GnuCOBOL (formerly OpenCOBOL) is a free COBOL compiler"
@@ -10,3 +10,12 @@ license="GPL-3"
 homepage="https://sourceforge.net/projects/open-cobol/"
 distfiles="${SOURCEFORGE_SITE}/open-cobol/gnu-cobol/2.2/gnucobol-2.2.tar.xz"
 checksum=dc18fc45c269debfe86a4bbe20a7250983cba6238ea1917e135df5926cd024a0
+depends="gnucobol-libs>=${version}_${revision}"
+
+gnucobol-libs_package() {
+        short_desc+=" - runtime libraries"
+        pkg_install() {
+                vmove usr/lib/*.so.*
+                vmove usr/lib/gnucobol
+        }
+}