Run the loop fewer times

This test sometimes hangs when run a lot. As best as I can tell this
is a Ubuntu problem, rather than a gdb problem as it only fails on
Ubuntu 24.04, but I am not sure. I cannot reproduce the problem
when using the UI.

Part of eclipse-cdt#816

dsf-gdb/org.eclipse.cdt.tests.dsf.gdb/src/org/eclipse/cdt/tests/dsf/gdb/tests/nonstop/ThreadStackFrameSyncTest.java

@@ -225,7 +225,7 @@ public void testGdbSyncServiceCanSwitchGDBStackFrame() throws Throwable {
 		final IFrameDMContext frame0 = SyncUtil.getStackFrame(1, 0);
 
 		// do a few of times
-		for (int i = 0; i < 50; i++) {
+		for (int i = 0; i < 10; i++) {
 			// have the sync service switch stack frame to 1
 			Query<MIInfo> query1 = new Query<>() {
 				@Override