maint: remove double semicolons in many files

maint: remove double semicolons in many files

A number of source files have statements accidentally
terminated by a double semicolon - eg 'foo = bar;;'.
This is harmless but a mistake none the less.

The tcg/ia64/tcg-target.c file is whitelisted because
it has valid use of ';;' in a comment containing assembly
code.

Signed-off-by: Daniel P. Berrange <[email protected]>
Reviewed-by: Marc-André Lureau <[email protected]>
Reviewed-by: Markus Armbruster <[email protected]>
Signed-off-by: Michael Tokarev <[email protected]>