[RuntimeDyld] Disable some ppc64 tests on 32-bit architectures.

These tests have been failing on 32-bit machines.

#62184.
(cherry picked from commit 2cd2fb4)

Author: lhames

llvm/test/ExecutionEngine/RuntimeDyld/PowerPC/ppc64_elf.s

@@ -1,3 +1,10 @@
+# This test has been observed to fail on 32-bit architectures (see e.g.
+# https://github.com/llvm/llvm-project/issues/62184). Since we're aiming to
+# bring up JITLink support for ppc64{le} anyway (see
+# https://github.com/llvm/llvm-project/issues/62253) I've opted to just disable
+# it on 32-bit architectures for now.
+# REQUIRES: llvm-64-bits
+#
 # RUN: rm -rf %t && mkdir -p %t
 # RUN: llvm-mc -triple=powerpc64le-unknown-linux-gnu -filetype=obj -o %t/ppc64_elf.o %s
 # RUN: llvm-mc -triple=powerpc64le-unknown-linux-gnu -filetype=obj -o %t/ppc64_elf_module_b.o %S/Inputs/ppc64_elf_module_b.s

llvm/test/ExecutionEngine/RuntimeDyld/PowerPC/ppc64_reloc.s

@@ -1,4 +1,12 @@
 # test for little endian
+#
+# This test has been observed to fail on 32-bit architectures (see e.g.
+# https://github.com/llvm/llvm-project/issues/62184). Since we're aiming to
+# bring up JITLink support for ppc64{le} anyway (see
+# https://github.com/llvm/llvm-project/issues/62253) I've opted to just disable
+# it on 32-bit architectures for now.
+# REQUIRES: llvm-64-bits
+#
 # RUN: rm -rf %t && mkdir -p %t
 # RUN: llvm-mc -triple=powerpc64le-unknown-linux-gnu -filetype=obj -o %t/ppc64_reloc.o %s
 # RUN: llvm-mc -triple=powerpc64le-unknown-linux-gnu -filetype=obj -o %t/ppc64_elf_module_b.o %S/Inputs/ppc64_elf_module_b.s