app_sms: Ignore false positive vectorization warning.

app_sms: Ignore false positive vectorization warning.

Ignore gcc warning about writing 32 bytes into a region of size 6,
since we check that we don't go out of bounds for each byte.
This is due to a vectorization bug in gcc 15, stemming from
gcc commit 68326d5d1a593dc0bf098c03aac25916168bc5a9.

Resolves: #1088
(cherry picked from commit dc2d559ccf06a806eff8045372dbdee048b261ee)