meson: add libcom_cppflags to C++ modules using LIBCOM

Following acad6ed0.

bdagraph.cpp actually uses IID_PPV_ARGS now.

modules/access/meson.build

@@ -331,7 +331,8 @@ if host_system == 'windows'
             dtv_common_sources,
             files('dtv/bdagraph.cpp')
         ],
-        'dependencies' : [strmiids_lib]
+        'dependencies' : [strmiids_lib],
+        'cpp_args' : libcom_cppflags
     }
 endif
 

modules/text_renderer/meson.build

@@ -67,7 +67,8 @@ if host_system == 'windows'
     if have_sapi
         vlc_modules += {
             'name' : 'sapi',
-            'sources' : files('sapi.cpp')
+            'sources' : files('sapi.cpp'),
+            'cpp_args' : libcom_cppflags
         }
     endif
 endif