[PATCH] mysql_install_db should check for missing shared library dependencies

When missing a required shared library like libaio or libjemalloc mysqld won't start up. mysqld_install_db detects the failed startup but does not provide useful feedback, it suggests to check the mysql error log which mysqld can't even create in this case.

The amount of following output also sort of hides the actual error message.

Feature request: mysql_install_db should check whether all shared library dependencies are met, using ldd output, before trying to start up mysqld for the first time. If any dependencies are found to be unmet it should just report this instead of its rather long general purpose error output.