Fix back-patching of memset_s() fixes.

I missed updating msvc/Solution.pm in one branch in 12eee85e5 et al.
Per buildfarm.

src/tools/msvc/Solution.pm

@@ -238,6 +238,7 @@ sub GenerateFiles
 		HAVE_DECL_LLVMGETHOSTCPUNAME => 0,
 		HAVE_DECL_LLVMGETHOSTCPUFEATURES => 0,
 		HAVE_DECL_LLVMORCGETSYMBOLADDRESSIN => 0,
+		HAVE_DECL_MEMSET_S => 0,
 		HAVE_DECL_POSIX_FADVISE => 0,
 		HAVE_DECL_PREADV => 0,
 		HAVE_DECL_PWRITEV => 0,
@@ -302,7 +303,6 @@ sub GenerateFiles
 		HAVE_MBARRIER_H => undef,
 		HAVE_MBSTOWCS_L => 1,
 		HAVE_MEMORY_H => 1,
-		HAVE_MEMSET_S => undef,
 		HAVE_MKDTEMP => undef,
 		HAVE_OPENSSL_INIT_SSL => undef,
 		HAVE_OSSP_UUID_H => undef,