shell: Call CHECK_DECL on stat64

On macOS it is possible to find stat64 at link-time but not at
compile-time.  To make the build process more robust we should
check for the header file as well as the library.

Reported-by: Saagar Jha <saagar@saagarjha.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
1 file changed