ArmVirtPkg/ArmVirtPrePiUniCoreRelocatable: ignore .hash and .note sections

Newer versions of ld automatically emit .gnu.hash and .note.gnu.build-id
sections, which are not listed in the linker script, and will end up
breaking the build with an allocation conflict, e.g.,

  /usr/bin/aarch64-linux-gnu-ld: section .note.gnu.build-id loaded at
    [0000000000000000,0000000000000023] overlaps section .text loaded at
    [0000000000000000,0000000000017dbf]

Since we don't require or care about these sections, update the linker
script so that they are discarded. Note that this involves emitting the
.note.gnu.build-id section into a non-allocatable segment to prevent the
linker from noticing that it is being discarded (and subsequently
complaining about it)

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Laszlo Ersek <lersek@redhat.com>
Acked-by: Jordan Justen <jordan.l.justen@intel.com>

ArmVirtPkg/PrePi/Scripts/PrePi-PIE.lds

@@ -30,8 +30,11 @@ SECTIONS
     PROVIDE(__reloc_end = .);
   }
 
+  .note (INFO) : { *(.note.gnu.build-id) }
+
   /DISCARD/ : {
     *(.note.GNU-stack)
+    *(.gnu.hash)
     *(.gnu_debuglink)
     *(.interp)
     *(.dynamic)