tests: Cleanup test log filenames

The log files were being named like:

	surface-global-test.la-log.txt
	surface-global-test.la-serverlog.txt
	surface-test.la-log.txt
	surface-test.la-serverlog.txt
	text.weston-log.txt
	text.weston-serverlog.txt

For consistency, omit the test filename's extension (.la/.so).

Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>
Signed-off-by: Bryce Harrington <bryce@osg.samsung.com>

tests/weston-tests-env

@@ -13,8 +13,8 @@ LOGDIR=$abs_builddir/logs
 
 mkdir -p "$LOGDIR"
 
-SERVERLOG="$LOGDIR/$1-serverlog.txt"
-OUTLOG="$LOGDIR/$1-log.txt"
+SERVERLOG="$LOGDIR/${TEST_NAME}-serverlog.txt"
+OUTLOG="$LOGDIR/${TEST_NAME}-log.txt"
 
 rm -f "$SERVERLOG"