Fix 'cord' headers path in EMX_MAKEFILE and README.QUICK

* EMX_MAKEFILE (CORD_INCLUDE_FILES): Replace cord/*.h files with
include/*.h ones (all "cord" header files moved in gc4.8).
* EMX_MAKEFILE (cords): Do not copy cord/*.h files to "include"
folder.
* README.QUICK: Replace cord/cord.h with include/cord.h; move sentence
about cord.h to the relevant paragraph.

EMX_MAKEFILE

@@ -34,8 +34,8 @@ OBJS= alloc.o reclaim.o allchblk.o misc.o mach_dep.o os_dep.o mark_rts.o headers
 
 CORD_OBJS= cord/cordbscs.o cord/cordxtra.o cord/cordprnt.o
 
-CORD_INCLUDE_FILES= $(srcdir)/gc.h $(srcdir)/cord/cord.h $(srcdir)/cord/ec.h \
-           $(srcdir)/cord/cord_pos.h
+CORD_INCLUDE_FILES= $(srcdir)/gc.h $(srcdir)/include/cord.h \
+    $(srcdir)/include/ec.h $(srcdir)/include/cord_pos.h
 
 # Libraries needed for curses applications.  Only needed for de.
 CURSES= -lcurses -ltermlib
@@ -67,9 +67,6 @@ gc.a: $(OBJS)
 cords: $(CORD_OBJS) cord/cordtest.exe
 	$(AR) ru gc.a $(CORD_OBJS)
 	$(RANLIB) gc.a
-	cp $(srcdir)/cord/cord.h include/cord.h
-	cp $(srcdir)/cord/ec.h include/ec.h
-	cp $(srcdir)/cord/cord_pos.h include/cord_pos.h
 
 gc_cpp.o: $(srcdir)/gc_cpp.cc $(srcdir)/gc_cpp.h
 	$(CXX) -c -O $(srcdir)/gc_cpp.cc

README.QUICK

@@ -52,13 +52,13 @@ Makefile.direct, type "make cords", after copying to "Makefile".
 (This requires an ANSI C compiler.  You may
 need to redefine CC in the Makefile. The CORD_printf implementation in
 cordprnt.c is known to be less than perfectly portable.  The rest of the
-package should still work.)
+package should still work.)  See include/cord.h for the API.
 
 If you wish to use the collector from C++, type "make c++", or use
 --enable-cplusplus with the configure script.   With Makefile.direct,
 these ones add further files to gc.a and to the include subdirectory.
-With the alternate build process,this generates libgccpp.
-See cord/cord.h and include/gc_cpp.h.
+With the alternate build process, this generates libgccpp.
+See include/gc_cpp.h.
 
 TYPICAL USE:
 Include "gc.h" from the include subdirectory.  Link against the