libc/glibc: workaround for autoconf'ed define of caddr_t

When building canadian cross compiler, I have some trouble with
configure defining caddr_t as a macro, like:
#define caddr_t char *

When combined with the types.h where caddr_t is protected together
with daddr_t, the typedef of caddr_t breaks.

This patch works around it by protecting the caddr_t typedef
specifically.

I am uncertain as to the real cause and solution to this :-(

Signed-off-by: Esben Haabendal <eha@dev.doredevelopment.dk>

diff -durN glibc-2.7.orig/Makerules glibc-2.7/Makerules

--- glibc-2.7.orig/Makerules	2007-08-26 04:18:03.000000000 +0200

+++ glibc-2.7/Makerules	2008-07-28 15:17:27.000000000 +0200

@@ -1203,6 +1203,9 @@

 # The include magic above causes those files to use this variable for flags.

 CPPFLAGS-nonlib = -DNOT_IN_libc=1

+ifneq ($(OBJDUMP_FOR_HOST),)

+OBJDUMP = $(OBJDUMP_FOR_HOST)

+endif

 ifeq ($(versioning),yes)

 # Generate normalized lists of symbols, versions, and data sizes.