run-tests: enable kyua parallelism by default.

Use number of processors as reported by /proc/cpuinfo,
otherwise just set it to 1 (default).

This makes running the test suite in less than 16s on my
i5 ivybridge CPU.

run-tests

@@ -6,7 +6,11 @@ done
 export PATH=$PATH:/usr/local/bin
 export LD_PRELOAD=$PWD/lib/libxbps.so
 
-kyua test -r result.db -k tests/xbps/Kyuafile
+NPROCS=1
+if [ -r /proc/cpuinfo ]; then
+	NPROCS=$(cat /proc/cpuinfo|grep processor|wc -l)
+fi
+kyua --variable parallelism=$NPROCS test -r result.db -k tests/xbps/Kyuafile
 rv=$?
 kyua report --verbose -r result.db
 rm -f result.db