[glibc] x86: Set RDRAND usable if CPU supports RDRAND

[H.J. Lu]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=2976082a385a7fb3d0294c6acf745b4f93e834ee

commit 2976082a385a7fb3d0294c6acf745b4f93e834ee
Author: H.J. Lu <hjl.tools@gmail.com>
Date:   Thu Dec 3 15:02:44 2020 -0800

    x86: Set RDRAND usable if CPU supports RDRAND
    
    Set RDRAND usable if CPU supports RDRAND.

Diff:
---
 sysdeps/x86/cpu-features.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/sysdeps/x86/cpu-features.c b/sysdeps/x86/cpu-features.c
index f26deba38d..fe080b63b2 100644
--- a/sysdeps/x86/cpu-features.c
+++ b/sysdeps/x86/cpu-features.c
@@ -85,6 +85,7 @@ update_usable (struct cpu_features *cpu_features)
   CPU_FEATURE_SET_USABLE (cpu_features, WAITPKG);
   CPU_FEATURE_SET_USABLE (cpu_features, GFNI);
   CPU_FEATURE_SET_USABLE (cpu_features, RDPID);
+  CPU_FEATURE_SET_USABLE (cpu_features, RDRAND);
   CPU_FEATURE_SET_USABLE (cpu_features, CLDEMOTE);
   CPU_FEATURE_SET_USABLE (cpu_features, MOVDIRI);
   CPU_FEATURE_SET_USABLE (cpu_features, MOVDIR64B);