git-ignores a few files that get generated as a part of build/test runs

.gitignore

@@ -57,3 +57,22 @@ logfile*
 !tests/testsuites/*.conf
 log
 /target
+tests/*.trs
+test-driver
+grammar/grammar.c
+grammar/grammar.h
+cscope.out
+.dirstamp
+tests/HOSTNAME
+tests/chkseq
+tests/diagtalker
+tests/inputfilegen
+tests/minitcpsrv
+tests/msleep
+tests/nettester
+tests/ourtail
+tests/randomgen
+tests/syslog_caller
+tests/syslog_inject
+tests/tcpflood
+tests/uxsockrcvr