record: Fix thread names on 64-bit targets

Also fixes the thread names on signed char targets.

Update #3665.

cpukit/libtrace/record/record-server.c

@@ -211,7 +211,10 @@ static bool thread_names_visitor( rtems_tcb *tcb, void *arg )
     data = 0;
 
     for ( j = 0; i < n && j < sizeof( data ); ++j ) {
-      data |= name[ i ] << ( j * 8 );
+      rtems_record_data c;
+
+      c = (unsigned char) name[ i ];
+      data |= c << ( j * 8 );
       ++i;
     }
 

cpukit/libtrace/record/record-userext.c

@@ -57,7 +57,10 @@ bool _Record_Thread_create(
     data = 0;
 
     for ( k = 0; j < n && k < sizeof( data ); ++k ) {
-      data |= name[ i ] << ( k * 8 );
+      rtems_record_data c;
+
+      c = (unsigned char) name[ i ];
+      data |= c << ( k * 8 );
       ++j;
     }