microprofile build doesn't work

[olehnikolaiev]

compiler returns an error when trying to build skaled with -DMICROPROFILE=ON

/home/oleh/work/skaled/libdevcore/microprofile.cpp:986:36: error: ‘void* memset(void*, int, size_t)’ clearing an object of type ‘struct MicroProfile’ with no trivial copy-assignment; use value-initialization instead [-Werror=class-memaccess]
  986 |         memset( &S, 0, sizeof( S ) );
      |                                    ^
/home/oleh/work/skaled/libdevcore/microprofile.cpp:496:8: note: ‘struct MicroProfile’ declared here
  496 | struct MicroProfile {
      |        ^~~~~~~~~~~~
/home/oleh/work/skaled/libdevcore/microprofile.cpp: In function ‘MicroProfileThreadLog* MicroProfileCreateThreadLog(const char*)’:
/home/oleh/work/skaled/libdevcore/microprofile.cpp:1136:42: error: ‘void* memset(void*, int, size_t)’ clearing an object of type ‘struct MicroProfileThreadLog’ with no trivial copy-assignment; use value-initialization instead [-Werror=class-memaccess]
 1136 |         memset( pLog, 0, sizeof( *pLog ) );

[PolinaKiporenko]

Added in 2.3 release due to it small fix and was found during work on #1640