Revise opcache settings in phpsdk_pgo.json

[cmb69]

php-sdk-binary-tools/pgo/tpl/php/phpsdk_pgo.json

Lines 23 to 34 in 69e50fe

	"x64": {
	"opcache.memory_consumption": 256,
	"opcache.interned_strings_buffer": 16,
	"opcache.max_accelerated_files": 8000,
	"opcache.jit_buffer_size": "32M"
	},
	"x86": {
	"opcache.memory_consumption": 64,
	"opcache.interned_strings_buffer": 8,
	"opcache.max_accelerated_files": 4000,
	"opcache.jit_buffer_size": "16M"
	}

This deviates from the recommended production settings; while that is not wrong or bad per se, I don't understand why the interned_strings_buffer and max_accelerated_files are halved for x86. Also, the jit_buffer_size might be too low. And why memory_consumption is only a quarter for x86, escapes me.