armcap.c is shared between 32- and 64-bit builds and features link-time detection of getauxval. Submitted by: Ard Biesheuvel. (cherry picked from commit e8d93e342b4b7d43c73e955e81e227c514d389d9)
(cherry picked from commit 4afa9f033dd58465b4c2d119a9d8cd737edeba26)