builtins: silence GCC warning

If the builtins are built with libgcc as the unwind provider on ARM, the exposed
_Unwind_SetIP is a macro.  This results in the following warning due to
expansion of the argument:

warning: suggest parentheses around arithmetic in operand of ‘|’ [-Wparentheses]

Add a no-op set of parenthesis around the argument that will prevent this
warning.

llvm-svn: 248686

compiler-rt/lib/builtins/gcc_personality_v0.c

@@ -198,7 +198,7 @@ __gcc_personality_v0(int version, _Unwind_Action actions,
             _Unwind_SetGR(context, __builtin_eh_return_data_regno(0),
                           (uintptr_t)exceptionObject);
             _Unwind_SetGR(context, __builtin_eh_return_data_regno(1), 0);
-            _Unwind_SetIP(context, funcStart+landingPad);
+            _Unwind_SetIP(context, (funcStart + landingPad));
             return _URC_INSTALL_CONTEXT;
         }
     }