cg-wasm: disable new multi-THEADR feature

need implementation in DIP and wlink to work properly in debugger
need more work for compatibility with OW 1.9 or introduce new compilers option for this feature

Author: jmalak

bld/cg/intel/c/x86obj.c

@@ -1176,12 +1176,17 @@ void    ObjInit( void )
     CurrFNo = 0;
     OpenObj();
     names = InitArray( sizeof( byte ), MODEST_HDR, INCREMENT_HDR );
+#ifdef MULTI_THEADR
     OutName( FEModuleName(), names );
     PutObjOMFRec( CMD_THEADR, names );
     if( _IsModel( CGSW_GEN_DBG_NUMBERS ) ) {
         OutName( FEAuxInfo( NULL, FEINF_SOURCE_NAME ), names );
         PutObjOMFRec( CMD_THEADR, names );
     }
+#else
+    OutName( FEAuxInfo( NULL, FEINF_SOURCE_NAME ), names );
+    PutObjOMFRec( CMD_THEADR, names );
+#endif
 #if _TARGET & _TARG_80386
     if( _IsTargetModel( CGSW_X86_EZ_OMF )
       || _IsTargetModel( CGSW_X86_FLAT_MODEL ) ) {

bld/wasm/c/write.c

@@ -1213,10 +1213,18 @@ static void writepass1stuff( const char *file_name )
         AsmError( END_OF_PROCEDURE_NOT_FOUND );
         return;
     }
+#ifdef MULTI_THEADR
     write_header( GetModuleName() );
     if( file_name != NULL ) {
         write_header( file_name );
     }
+#else
+    if( Options.module_name != NULL ) {
+        write_header( Options.module_name );
+    } else {
+        write_header( file_name );
+    }
+#endif
     write_autodep();
     if( Globals.dosseg )
         write_dosseg();