x86: Don't remove empty GNU_PROPERTY_X86_UINT32_OR_AND properties

For GNU_PROPERTY_X86_COMPAT_ISA_1_USED and GNU_PROPERTY_X86_UINT32_OR_AND
properties, a bit in the output pr_data field is set if it is set in any
relocatable input pr_data fields and this property is present in all
relocatable input files.  A missing property implies that its bits have
unknown values.  When all bits in the the output pr_data field are zero,
this property should not be removed from output to indicate it has zero
in all bits.

bfd/

	PR ld/23372
	* elfxx-x86.c (_bfd_x86_elf_merge_gnu_properties): Don't remove
	empty properties for GNU_PROPERTY_X86_COMPAT_ISA_1_USED and
	GNU_PROPERTY_X86_UINT32_OR_AND.
	(_bfd_x86_elf_link_fixup_gnu_properties): Likewise.

ld/

	PR ld/23372
	* testsuite/ld-i386/pr23372a.d: Updated.
	* testsuite/ld-i386/pr23372c.d: Likewise.
	* testsuite/ld-x86-64/pr23372a-x32.d: Likewise.
	* testsuite/ld-x86-64/pr23372a.d: Likewise.
	* testsuite/ld-x86-64/pr23372c-x32.d: Likewise.
	* testsuite/ld-x86-64/pr23372c.d: Likewise.

2 files changed, 10 insertions, 0 deletions

diff --git a/ld/testsuite/ld-i386/pr23372a.d b/ld/testsuite/ld-i386/pr23372a.d
index b75523b..7af7efb 100644
--- a/ld/testsuite/ld-i386/pr23372a.d
+++ b/ld/testsuite/ld-i386/pr23372a.d
@@ -3,3 +3,8 @@
 #as: --32
 #ld: -r -m elf_i386
 #readelf: -n
+
+Displaying notes found in: .note.gnu.property
+  Owner                 Data size	Description
+  GNU                  0x[0-9a-f]+	NT_GNU_PROPERTY_TYPE_0
+      Properties: x86 ISA used: 
diff --git a/ld/testsuite/ld-i386/pr23372c.d b/ld/testsuite/ld-i386/pr23372c.d
index 987ae4c..d5bcc4d 100644
--- a/ld/testsuite/ld-i386/pr23372c.d
+++ b/ld/testsuite/ld-i386/pr23372c.d
@@ -3,3 +3,8 @@
 #as: --32
 #ld: -r -m elf_i386
 #readelf: -n
+
+Displaying notes found in: .note.gnu.property
+  Owner                 Data size	Description
+  GNU                  0x[0-9a-f]+	NT_GNU_PROPERTY_TYPE_0
+      Properties: x86 ISA used: