Comment macros to stop using VDSO

Comment macros to stop using VDSO

The VDSO is responsible for the virtual system calls in a basic
linux application and makes so that some system calls will be faster
because the transition between kernel mode and user mode is eliminated.
Therefore, it shouldn't be used in Unikraft. At the moment, in musl
this feature is enabled and functions like __clock_gettime will generate
a segfault.

Signed-off-by: Florin Postolache <florin.postolache80@gmail.com>
Reviewed-by: Dragos Iulian Argint <dragosargint21@gmail.com>
Approved-by: Simon Kuenzer <simon.kuenzer@neclab.eu>
Tested-by: Unikraft CI <monkey@unikraft.io>
GitHub-Pull-Request: #10