pygoscelis: Enable CONFIG_RANDSTRUCT_PERFORMANCE again

This was already enabled in 2022 (7b2b827d34)
but disabled when bpf support was enabled for use within systemd 243
(01b1f8af04).

Looks as we can enable both now in 6.12, so let's do that.

pygoscelis-config

@@ -6447,9 +6447,11 @@ CONFIG_LIST_HARDENED=y
 CONFIG_BUG_ON_DATA_CORRUPTION=y
 # end of Hardening of kernel data structures
 
-CONFIG_RANDSTRUCT_NONE=y
+# CONFIG_RANDSTRUCT_NONE is not set
 # CONFIG_RANDSTRUCT_FULL is not set
-# CONFIG_RANDSTRUCT_PERFORMANCE is not set
+CONFIG_RANDSTRUCT_PERFORMANCE=y
+CONFIG_RANDSTRUCT=y
+CONFIG_GCC_PLUGIN_RANDSTRUCT=y
 # end of Kernel hardening options
 # end of Security options
 
@@ -7238,5 +7240,6 @@ CONFIG_GENTOO_LINUX_INIT_SYSTEMD=y
 # end of Support for init systems, system and service managers
 
 CONFIG_GENTOO_KERNEL_SELF_PROTECTION=y
+# CONFIG_GENTOO_KERNEL_SELF_PROTECTION_COMMON is not set
 CONFIG_GENTOO_PRINT_FIRMWARE_INFO=y
 # end of Gentoo Linux