Fix ATTRIBUTE_NO_ADDRESS_SAFETY_ANALYSIS for MSAN

There's no case for when RUBY_MSAN_ENABLED, so the macro ends up doing
nothing when it should instead have __attribute__((__no_sanitize__("memory"))).

Author: peterzhu2118

internal/sanitizers.h

@@ -39,6 +39,9 @@
 #elif defined(RUBY_ASAN_ENABLED)
 # define ATTRIBUTE_NO_ADDRESS_SAFETY_ANALYSIS(x) \
     __attribute__((__no_sanitize__("address"), __noinline__)) x
+#elif defined(RUBY_MSAN_ENABLED)
+    # define ATTRIBUTE_NO_ADDRESS_SAFETY_ANALYSIS(x) \
+    __attribute__((__no_sanitize__("memory"), __noinline__)) x
 #elif defined(NO_SANITIZE_ADDRESS)
 # define ATTRIBUTE_NO_ADDRESS_SAFETY_ANALYSIS(x) \
     NO_SANITIZE_ADDRESS(NOINLINE(x))