[Bug-tar] configure misses lstat on zaurus

[tz]

The configure program uses a very simple test which fails, but Linux on 
the zaurus seems to inline and/or change the return type of lstat from 
char to int.  It is in (include path) sys/stat.h

The test occurs around line 18079.  The other functions in the loop 
seem to test correctly.

If I do #include <sys/stat.h> (which doesn't occur in the minimal test 
program), I get a return type conflict error.  If I don't include it, 
it says lstat doesn't exist.

Manually modifying #define HAS_LSTAT 1 made it work fine (and correctly 
detect symlinks and such).