[lldb][test] FrameFormat tests: Specify filename when setting breakpoints

Try to work around following error on some of the Linux CI:
```
            8: (lldb) settings set -f frame-format "custom-frame '${function.basename}'\n"
check:50'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
check:50'1                                          ?                                       possible intended match
            9: (lldb) break set -l 5
check:50'0     ~~~~~~~~~~~~~~~~~~~~~~
           10: error: No selected frame to use to find the default file.
check:50'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
           11: error: No file supplied and no default file available.
check:50'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
           12: (lldb) exit
check:50'0     ~~~~~~~~~~~~
```

Author: Michael137

lldb/test/Shell/Settings/TestCxxFrameFormat.test

@@ -24,7 +24,7 @@ int main(int argc, char const *argv[]) {
 #--- commands.input
 settings set plugin.cplusplus.display.function-name-format "${function.scope}${function.basename}"
 settings set -f frame-format "custom-frame '${function.name-with-args}'\n"
-break set -l 3
+break set -l 3 -f main.cpp
 
 run
 bt

lldb/test/Shell/Settings/TestCxxFrameFormatObjC.test

@@ -17,7 +17,7 @@ int main() { return bar(10); }
 #--- commands.input
 settings set plugin.cplusplus.display.function-name-format "this affects C++ only"
 settings set -f frame-format "custom-frame '${function.name-with-args}'\n"
-break set -l 3
+break set -l 3 -f main.m
 run
 
 bt

lldb/test/Shell/Settings/TestCxxFrameFormatPartialFailure.test

@@ -22,7 +22,7 @@ int main(int argc, const char *argv[]) {
 #--- commands.input
 settings set plugin.cplusplus.display.function-name-format "${function.basename}${script.target:invalid_func}"
 settings set -f frame-format "custom-frame '${function.name-with-args}'\n"
-break set -l 2
+break set -l 2 -f main.cpp
 
 run
 bt

lldb/test/Shell/Settings/TestFrameFormatFunctionBasename.test

@@ -38,7 +38,7 @@ int main() {
 
 #--- commands.input
 settings set -f frame-format "custom-frame '${function.basename}'\n"
-break set -l 5
+break set -l 5 -f main.cpp
 
 run
 bt

lldb/test/Shell/Settings/TestFrameFormatFunctionTemplateArguments.test

@@ -29,7 +29,7 @@ int main() { return bar(); }
 
 #--- commands.input
 settings set -f frame-format "custom-frame '${function.template-arguments}'\n"
-break set -l 4
+break set -l 4 -f main.cpp
 
 run
 bt