[bazel]Move HAVE_GETAUXVAL from config.h to config.bzl (llvm#127637)

This fixes build errors on mac OS.

Author: dklimkin

utils/bazel/llvm-project-overlay/llvm/config.bzl

@@ -47,6 +47,7 @@ posix_defines = [
 
 linux_defines = posix_defines + [
     "_GNU_SOURCE",
+    "HAVE_GETAUXVAL=1",
     "HAVE_MALLINFO=1",
     "HAVE_SBRK=1",
     "HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC=1",

utils/bazel/llvm-project-overlay/llvm/include/llvm/Config/config.h

@@ -296,7 +296,7 @@
 
 /* HAVE_PROC_PID_RUSAGE defined in Bazel */
 
-#define HAVE_GETAUXVAL 1
+/* HAVE_GETAUXVAL defined in Bazel */
 
 /* Directly provide definitions here behind platform preprocessor definitions.
  * The preprocessor conditions are sufficient to handle all of the configuration