Bug#1071555: gcc-14: Drop sys-auxv-header.diff
Package: src:gcc-14
I find that `sys-auxv-header.diff` is not useful now.
In `AC_CHECK_HEADERS`, `sys/auxv.h` is already here, we don't need to add it.
```
/* Define to 1 if you have the <sys/auxv.h> header file. */
#ifndef USED_FOR_TARGET
#undef HAVE_SYS_AUXV_H
#endi
```
is also duplicated.
```
+#ifdef HAVE_SYS_AUXV_H
+# include <sys/auxv.h>
+#endif
```
in driver-rs6000.cc, it is not needed.
AT_NULL does be used, while it is defined in /usr/include/elf.h,
which is included by /usr/include/link.h
Maybe we need a upstream patch to make things clearer, while downstream patch
is not needed now.
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