Add SSE to i386 builds

[yosifkit]

Fixes #1683 for 8.6-rc and 8.5.10. Applied to all versions, because it "should" make it faster.

xmm0 - xmm7 are the SSE registers.

Where the xmm* registers were added to PHP: php/php-src@8c96f53d91c#diff-62b1ac3b4be89a1968b7a4b5d8eb9e90ea7812e1c6bbf4bc29a2a48b3e7c6c06R117

Build error:

/usr/src/php/ext/opcache/jit/tls/zend_jit_tls_x86.c: In function 'zend_jit_resolve_tsrm_ls_cache_offsets':
/usr/src/php/ext/opcache/jit/tls/zend_jit_tls_x86.c:95:9: error: the register 'xmm7' cannot be clobbered in 'asm' for the current target
   95 |         __asm__ __volatile__(
      |         ^~~~~~~
make: *** [Makefile:1728: ext/opcache/jit/tls/zend_jit_tls_x86.lo] Error 1

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🤔 I think this should also be applied to the Alpine images. ❓