libdex: add libucontext-devel to -devel depends

Fixed previous broken commit: 1431b4991e

srcpkgs/libdex/template

@@ -26,6 +26,7 @@ build_options_default="gir vala gtk_doc"
 
 if [ "$XBPS_TARGET_LIBC" = musl ]; then
 	makedepends+=" libucontext-devel"
+	_devdepends="libucontext-devel"
 	CFLAGS="-D_GNU_SOURCE"
 fi
 
@@ -36,10 +37,7 @@ else
 fi
 
 libdex-devel_package() {
-	depends="${sourcepkg}-${version}_${revision} liburing-devel"
-	if [ "$XBPS_TARGET_LIBC" = musl ]; then
-		depends+=" libucontext-devel"
-	else
+	depends="${sourcepkg}-${version}_${revision} ${_devdepends} liburing-devel"
 	short_desc+=" - development files"
 	pkg_install() {
 		vmove usr/include