Add -z pauth-report description to lld's man page

Author: kovdan01

lld/docs/ld.lld.1

@@ -762,6 +762,11 @@ Specify how to report the missing GNU_PROPERTY_X86_FEATURE_1_IBT or GNU_PROPERTY
 .Cm none
 is the default, linker will not report the missing property otherwise will be reported as a warning or an error.
 .Pp
+.It Cm pauth-report Ns = Ns Ar [none|warning|error]
+Specify how to report the missing GNU_PROPERTY_AARCH64_FEATURE_PAUTH property.
+.Cm none
+is the default, linker will not report the missing property otherwise will be reported as a warning or an error.
+.Pp
 .It Cm force-bti
 Force enable AArch64 BTI instruction in PLT, warn if Input ELF file does not have GNU_PROPERTY_AARCH64_FEATURE_1_BTI property.
 .Pp