clang: make linter happy

Signed-off-by: Amneesh Singh <natto@weirdnatto.in>

tests/cpu/arm/instruction.cc

@@ -1,7 +1,7 @@
 #include "cpu/arm/instruction.hh"
 #include <catch2/catch_test_macros.hpp>
 
-static constexpr auto TAG = "[arm][disassembly]";
+#define TAG "[arm][disassembly]"
 
 using namespace matar;
 using namespace arm;
@@ -505,3 +505,5 @@ TEST_CASE("Software Interrupt", TAG) {
     CHECK(instruction.disassemble() == "SWIEQ");
 #endif
 }
+
+#undef TAG