gstaes: fixed missing symbols and rework on dependencies

In our dynamic build winsock2 symbols are missing.

subprojects/gst-plugins-bad/ext/aes/meson.build

@@ -6,20 +6,22 @@ aes_sources = [
 ]
 
 aes_cargs = []
-aes_dep = dependency('openssl', version : '>= 1.1.0', required : get_option('aes'))
-if aes_dep.found()
+openssl_dep = dependency('openssl', version : '>= 1.1.0', required : get_option('aes'))
+if openssl_dep.found()
   aes_cargs += ['-DHAVE_OPENSSL']
 else
   subdir_done()
 endif
 
+winsock2_dep = cc.find_library('ws2_32', required : false)
+gst_aes_deps = [gstpbutils_dep, gstvideo_dep, openssl_dep, winsock2_dep, gio_dep, libm]
+
 gstaes = library('gstaes',
   aes_sources,
   c_args : gst_plugins_bad_args + aes_cargs,
   link_args : noseh_link_args,
   include_directories : [configinc],
-  dependencies : [gstpbutils_dep, gstvideo_dep,
-                  aes_dep, gio_dep, libm],
+  dependencies : gst_aes_deps,
   install : true,
   install_dir : plugins_install_dir,
 )