WITH_MSAN is disabling WOLFSSL_AESNI acceleration

diff --git a/extra/wolfssl/CMakeLists.txt b/extra/wolfssl/CMakeLists.txt

index c99fb155dd6..f3b1c2af2c3 100644

--- a/extra/wolfssl/CMakeLists.txt

+++ b/extra/wolfssl/CMakeLists.txt

@@ -17,16 +17,11 @@ ELSEIF(CMAKE_SYSTEM_PROCESSOR MATCHES "x86_64|amd64")

   IF(CMAKE_C_COMPILER_ID MATCHES GNU  AND CMAKE_C_COMPILER_VERSION VERSION_LESS 4.9)

     MESSAGE_ONCE(NO_INTEL_ASSEMBLY "Disable Intel assembly for WolfSSL - compiler is too old")

   ELSE()

-    IF(WITH_MSAN)

-      MESSAGE_ONCE(MSAN_CANT_HANDLE_IT

-	"Disable Intel assembly for WolfSSL - MSAN can't handle it")

-    ELSE()

-      MY_CHECK_C_COMPILER_FLAG(-maes)

-      MY_CHECK_C_COMPILER_FLAG(-msse4)

-      MY_CHECK_C_COMPILER_FLAG(-mpclmul)

-      IF(have_C__maes AND have_C__msse4 AND have_C__mpclmul)

-        SET(WOLFSSL_INTELASM ON)

-      ENDIF()

+    MY_CHECK_C_COMPILER_FLAG(-maes)

+    MY_CHECK_C_COMPILER_FLAG(-msse4)

+    MY_CHECK_C_COMPILER_FLAG(-mpclmul)

+    IF(have_C__maes AND have_C__msse4 AND have_C__mpclmul)

+      SET(WOLFSSL_INTELASM ON)

     ENDIF()

     MY_CHECK_C_COMPILER_FLAG(-mrdrnd)

     MY_CHECK_C_COMPILER_FLAG(-mrdseed)

2021-01-02 12:24:07 0 [Note] InnoDB: Encrypting redo log: 10485760 bytes; LSN=48382

2021-01-02 12:24:07 0 [Note] InnoDB: Starting to delete and rewrite log file.

2021-01-02 12:24:07 0 [Note] InnoDB: Setting log file ./ib_logfile101 size to 10485760 bytes

Uninitialized bytes in __interceptor_pwrite64 at offset 500 inside [0x7fce3670e000, 512)

==315544==WARNING: MemorySanitizer: use-of-uninitialized-value

    #0 0x5562f26baf94 in SyncFileIO::execute(IORequest const&) /mariadb/10.5m/storage/innobase/os/os0file.cc:742:13

Uninitialized bytes in __interceptor_pwrite64 at offset 16378 inside [0x728000040000, 16384)

==315509==WARNING: MemorySanitizer: use-of-uninitialized-value

Uninitialized bytes in __interceptor_pwrite64 at offset 16378 inside [0x728000044000, 16384)

    #0 0x5603a7d0112a in tpool::simulated_aio::simulated_aio_callback(void*) /mariadb/10.5m/tpool/aio_simulated.cc:148:16

diff --git a/storage/innobase/os/os0file.cc b/storage/innobase/os/os0file.cc

index ac362e50404..b1626285196 100644

--- a/storage/innobase/os/os0file.cc

+++ b/storage/innobase/os/os0file.cc

@@ -3224,6 +3224,7 @@ os_file_pwrite(

 	const bool monitor = MONITOR_IS_ON(MONITOR_OS_PENDING_WRITES);

 	MONITOR_ATOMIC_INC_LOW(MONITOR_OS_PENDING_WRITES, monitor);

+	MEM_CHECK_DEFINED(buf, n);

 	ssize_t	n_bytes = os_file_io(type, file, const_cast<byte*>(buf),

 				     n, offset, err);

 	MONITOR_ATOMIC_DEC_LOW(MONITOR_OS_PENDING_WRITES, monitor);

Uninitialized bytes in __msan_check_mem_is_initialized at offset 500 inside [0x7f731195e000, 512)

==320701==WARNING: MemorySanitizer: use-of-uninitialized-value

    #0 0x556a7492c2bf in os_file_pwrite(IORequest const&, int, unsigned char const*, unsigned long, unsigned long, dberr_t*) /mariadb/10.5m/storage/innobase/os/os0file.cc:3227:2

...

  Uninitialized value was stored to memory at

    #0 0x556a724ca909 in __msan_memcpy (/dev/shm/10.5msan/sql/mariadbd+0x716909)

    #1 0x556a74903869 in log_crypt(unsigned char*, unsigned long, unsigned long, log_crypt_t) /mariadb/10.5m/storage/innobase/log/log0crypt.cc:211:3

  Uninitialized value was stored to memory at

    #0 0x556a7427a056 in MyCTX_nopad::finish(unsigned char*, unsigned int*) /mariadb/10.5m/mysys_ssl/my_crypt.cc:158:15

  Uninitialized value was created by an allocation of 'mask' in the stack frame of function '_ZN11MyCTX_nopad6finishEPhPj'

    #0 0x556a74279960 in MyCTX_nopad::finish(unsigned char*, unsigned int*) /mariadb/10.5m/mysys_ssl/my_crypt.cc:133