[vector] RFR: Add missing @ForceInline on public API methods

[Paul Sandoz]

+1

Paul.

> On Apr 7, 2020, at 6:44 AM, Vladimir Ivanov <vladimir.x.ivanov at oracle.com> wrote:
> 
> http://cr.openjdk.java.net/~vlivanov/panama/vector/inline/webrev.00/
> 
> Some public API methods miss @ForceInline annotaiton.
> 
> It can lead to significant performance degradations (due to additional complications for vector box elimination).
> 
> Testing: jdk/incubator/vector tests
> 
> The patch is against vectorIntrinsics branch.
> 
> Best regards,
> Vladimir Ivanov