Bugfix
   * Fix missing constraints on x86_64 assembly code for bignum multiplication
     that broke some bignum operations with (at least) Clang 12. Fixes #4786.

Bugfix
   * Fix missing constraints on x86_64 assembly code for bignum multiplication
     that broke some bignum operations with (at least) Clang 12.
     Fixes #4116, #4786, #4917.

Update the list of issues fixed
Update the list of issues fixed

This had actually been reported multiple times.

Signed-off-by: Gilles Peskine <f805f64266d288fc5467baa7be6cd0ff366f477b@arm.com>
