11394 iconv_modules build could be much more parallel

@@ -33,9 +33,11 @@
 clean           :=      TARGET = clean
 clobber         :=      TARGET = clobber
 
 all install lint clean clobber: $(SUBDIRS)
 
+.PARALLEL: $(SUBDIRS)
+
 $(SUBDIRS): FRC
         cd $@; $(MAKE) $(TARGET)
 
 FRC: