[gdb/testsuite] Fix FAIL in gdb.base/annota1.exp On openSUSE tumbleweed I run into: ... FAIL: gdb.base/annota1.exp: run until main breakpoint (timeout) ... due to a message related to libthread_db: ... ^Z^Zstarting^M [Thread debugging using libthread_db enabled]^M Using host libthread_db library "/lib64/libthread_db.so.1".^M ^M ^Z^Zframes-invalid^M ... which is not matched by the regexp. Fix this by updating the regexp. Tested on x86_64-linux.

diff --git a/gdb/testsuite/gdb.base/annota1.exp b/gdb/testsuite/gdb.base/annota1.exp
index 7a08137..13e82c1 100644
--- a/gdb/testsuite/gdb.base/annota1.exp
+++ b/gdb/testsuite/gdb.base/annota1.exp

@@ -136,6 +136,10 @@
 	 "to use the section anyway\\."]
 set reading_re \
     "Reading \[^\r\n\]+"
+set libthread_db_re \
+    [multi_line \
+	 "\\\[Thread debugging using libthread_db enabled\\\]" \
+	 "Using host libthread_db library \[^\r\n\]+"]
 
 set run_re \
     [list \
@@ -143,7 +147,7 @@
 	 "\(\(\r\n$reading_re\)|\(\r\n$warning_slow_re\)\)*" \
 	 "\(\r\n$warning_gdb_index_re\)?" \
 	 "\(\(\r\n\r\n\032\032frames-invalid\)|\(\r\n\r\n\032\032breakpoints-invalid\)\)*\r\n\r\n" \
-	 "\032\032starting\(\(\r\n$reading_re\)|\(\r\n$warning_slow_re\)\)*" \
+	 "\032\032starting\(\(\r\n$reading_re\)|\(\r\n$warning_slow_re\)|\r\n$libthread_db_re\)*" \
 	 "\(\(\r\n\r\n\032\032frames-invalid\)|\(\r\n\r\n\032\032breakpoints-invalid\)\)*\r\n\r\n" \
 	 "\032\032breakpoint 1\r\n\r\n" \
 	 "Breakpoint 1, \r\n" \