src/solaris/native/java/io/io_util_md.c needs to include <string.h> on linux
to get a valid function prototype for strlen on ia64.
strlen returns a 64 bit value, but the calling routine
is expecting 32 bit.

As it happens, this does not cause a problem in this case because
the lower half of the 64 bit return value is interpreted correctly
as a 32 bit value. But it is a compile warning that should be cleaned up.