configure warning for gmp 5.0.1 on HP-UX 11

[Michael Haardt]

Hello,

as asked for by configure:

configure: WARNING: sys/sysinfo.h: present but cannot be compiled
configure: WARNING: sys/sysinfo.h:     check for missing prerequisite headers?
configure: WARNING: sys/sysinfo.h: see the Autoconf documentation
configure: WARNING: sys/sysinfo.h:     section "Present But Cannot Be Compiled"
configure: WARNING: sys/sysinfo.h: proceeding with the compiler's result
configure: WARNING:     ## ---------------------------------- ##
configure: WARNING:     ## Report this to gmp-bugs at gmplib.org ##
configure: WARNING:     ## ---------------------------------- ##

The problem is that <sys/sysinfo.h> requires struct syswait, which is
declared in <sys/sar.h>.

Build and host system is hppa1.1-hp-hpux11.00.

Michael