Bump LLVM version to 17.0.1

Changes: https://releases.llvm.org/17.0.1/docs/ReleaseNotes.html
Changes: https://releases.llvm.org/17.0.1/tools/lld/docs/ReleaseNotes.html

LLVM 17.0.1 has just been released.  For full set of changes in this
release please see the links above.   The changes that are relevant to
Xamarin.Android are:

  * Typed pointers are no longer supported and the -opaque-pointers
    option has been removed. See the opaque pointers documentation for
    migration instructions.
  * The nofpclass attribute was introduced. This allows more
    optimizations around special floating point value comparisons.

Author: grendello