[lldb][test][Windows] Fix NonStop tests on case insensitive file systems

On a case insensitive file sytem, the build dir for `test_multiple_c` and
`test_multiple_C` are the same and therefore the log files are in the same
place. This means one tries to clear the log file for the other.

To fix this, make the names unique by adding the meaning of each
protocol packet.

https://sourceware.org/gdb/current/onlinedocs/gdb.html/Packets.html#Packets

Author: DavidSpickett

lldb/test/API/tools/lldb-server/TestNonStop.py

@@ -220,15 +220,15 @@ def multiple_resume_test(self, second_command):
         self.expect_gdbremote_sequence()
 
     @add_test_categories(["llgs"])
-    def test_multiple_C(self):
+    def test_multiple_C_continue_with_signal(self):
         self.multiple_resume_test("C05")
 
     @add_test_categories(["llgs"])
-    def test_multiple_c(self):
+    def test_multiple_c_continue_with_addr(self):
         self.multiple_resume_test("c")
 
     @add_test_categories(["llgs"])
-    def test_multiple_s(self):
+    def test_multiple_s_single_step_with_addr(self):
         self.multiple_resume_test("s")
 
     @skipIfWindows