Conda-forge's build environment on ARM uses sysroot_linux-aarch64 2.17, which
is based on glibc 2.17 so <sys/auxv.h> does not define HWCAP_* values on ARM.
Work around this by including the kernel header to get the desired values.

--- a/htslib/htscodecs/htscodecs/rANS_static4x16pr.c	2023-10-10 02:54:16
+++ b/htslib/htscodecs/htscodecs/rANS_static4x16pr.c	2024-03-06 00:01:14
@@ -1011,6 +1011,8 @@
 
 #if defined(__linux__) || defined(__FreeBSD__)
 #include <sys/auxv.h>
+// Ensure ARM HWCAP_* values are defined even on old glibc
+#include <asm/hwcap.h>
 #elif defined(_WIN32)
 #include <processthreadsapi.h>
 #endif