Fix all code that had trailing semicolons.

Some downstream projects also consider these as errors, so this change catches the breakages at the source.

Bug: b/130343040
Bug: b/130335507
Change-Id: I19ef3b5c682524542cde68f917ca9310a19da286
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/29810Reviewed-by: Nicolas Capens <nicolascapens@google.com>
Tested-by: Ben Clayton <bclayton@google.com>
Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>