[NFC][X86] Correct tests with wrong locations before.

diff --git a/clang/test/CodeGen/avxifma-builtins.c b/clang/test/CodeGen/X86/avxifma-builtins.c
similarity index 100%
rename from clang/test/CodeGen/avxifma-builtins.c
rename to clang/test/CodeGen/X86/avxifma-builtins.c

diff --git a/clang/test/CodeGen/avxvnniint8-builtins.c b/clang/test/CodeGen/X86/avxvnniint8-builtins.c
similarity index 100%
rename from clang/test/CodeGen/avxvnniint8-builtins.c
rename to clang/test/CodeGen/X86/avxvnniint8-builtins.c