Switch gcc dependenency to gcc-libs

pkg.info

@@ -1,9 +1,10 @@
 name: libsigcpp
 description: Typesafe callback system for standard C++
 version: 2.12.1
+revision: 2
 url: https://libsigcplusplus.github.io/libsigcplusplus/
 license: LGPL
 architecture: any
-depends: ["gcc"]
+depends: ["gcc-libs"]
 make_depends: ["meson"]
 type: source