hwloc-calc.1: use "all" instead of "machine:0"

"machine:0" is still supported but mostly useless
since the custom assembly backend was removed in 2.0.

Signed-off-by: Brice Goglin <Brice.Goglin@inria.fr>

utils/hwloc/hwloc-calc.1in

@@ -217,7 +217,7 @@ package:
 To bind GNU OpenMP threads logically over the whole machine, we need to use
 physical number output instead:
 
-    $ export GOMP_CPU_AFFINITY=`hwloc-calc --physical-output --intersect PU machine:0`
+    $ export GOMP_CPU_AFFINITY=`hwloc-calc --physical-output --intersect PU all`
     $ echo $GOMP_CPU_AFFINITY
     0,4,1,5,2,6,3,7
 
@@ -278,7 +278,7 @@ To get the set of first threads of all cores:
 This can also be very useful in order to make GNU OpenMP use exactly one thread
 per core, and in logical core order:
 
-    $ export OMP_NUM_THREADS=`hwloc-calc --number-of core machine:0`
+    $ export OMP_NUM_THREADS=`hwloc-calc --number-of core all`
     $ echo $OMP_NUM_THREADS
     4
     $ export GOMP_CPU_AFFINITY=`hwloc-calc --physical-output --intersect PU core:all.pu:0`