[compiler-rt] Revert "[hwasan] Add fixed_shadow_base flag" (PR #95435)

[Vitaly Buka via llvm-commits]

vitalybuka wrote:

> I think that's incorrect:
> 
> ```
> #ifndef SANITIZER_CAN_USE_PREINIT_ARRAY
> #if (SANITIZER_LINUX || SANITIZER_FUCHSIA || SANITIZER_NETBSD) && !defined(PIC)
> #define SANITIZER_CAN_USE_PREINIT_ARRAY 1
> // Before Solaris 11.4, .preinit_array is fully supported only with GNU ld.
> // FIXME: Check for those conditions.
> ```
> 
> ANDROID is Linnux and does in fact _support_ preinit array, we just don't use it for HWASan.

Is hwasan dynamic lib? if so .preinit_array can not be used

https://github.com/llvm/llvm-project/pull/95435