cross-localedef-native: fix build on hosts with older glibc

cross-localedef-native: fix build on hosts with older glibc

Older glibc on host might be missing __glibc_has_attribute added in glibc-2.34 with:

https://sourceware.org/git/?p=glibc.git;a=blobdiff;f=misc/sys/cdefs.h;h=8e244a77cf6271f09cbd26d18b1e07b1d1641404;hp=57ca262bdfb642bf4a945645532f2319ec1ff437;hb=c8ba52ab3350c334d6e34b1439a4c0c1431351f3;hpb=7dd416491e080456fc7742d884c520526509413e

Fixes:
In file included from ../git/localedef/include/programs/xmalloc.h:21,
                 from glibc/locale/programs/localedef.h:124,
                 from glibc/locale/programs/localedef.c:36:
../git/localedef/include/sys/cdefs.h:85:51: error: missing binary operator before token "("
   85 | #if __GNUC_PREREQ (4, 3) || __glibc_has_attribute (__cold__)
      |                                                   ^

Only commit included:
e0eca29 cdefs.h: define __glibc_has_attribute

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>