Change Makefile to (hopefully) load the objc runtime

Author: kastiglione

lldb/test/API/commands/command/language/Makefile

@@ -1,3 +1,5 @@
 OBJCXX_SOURCES := main.mm
+CFLAGS_EXTRAS := -fobjc-arc
 CXX_SOURCES := lib.cpp
+LD_EXTRAS := -lobjc
 include Makefile.rules

lldb/test/API/commands/command/language/TestFrameLanguageCommands.py

@@ -25,7 +25,7 @@ def test(self):
         )
 
         # Run a `language cplusplus` command.
-        self.expect(f"demangle _Z1fv", startstr="_Z1fv ---> f()")
+        self.expect("demangle _Z1fv", startstr="_Z1fv ---> f()")
         # Test prefix matching.
         self.expect("dem _Z1fv", startstr="_Z1fv ---> f()")