Don't use `trace_' prefix for FT_COMPONENT arguments.

* include/freetype/internal/ftdebug.h (FT_TRACE_COMP,
FT_TRACE_COMP_): New auxiliary macros to add `trace_' prefix.
(FT_TRACE): Use `FT_TRACE_COMP'.

*/* (FT_COMPONENT): Updated.
diff --git a/src/bdf/bdflib.c b/src/bdf/bdflib.c
index 8133bc6..e6a4682 100644
--- a/src/bdf/bdflib.c
+++ b/src/bdf/bdflib.c
@@ -49,7 +49,7 @@
    * messages during execution.
    */
 #undef  FT_COMPONENT
-#define FT_COMPONENT  trace_bdflib
+#define FT_COMPONENT  bdflib
 
 
   /**************************************************************************