Patch out call to /bin/sh which is not available in the default build
environment at that path.

--- a/arch/arm64/tools/Makefile.orig      2026-06-28 12:17:59.215652903 -0700
+++ b/arch/arm64/tools/Makefile   2026-06-28 12:18:08.234849294 -0700
@@ -19,7 +19,7 @@
       cmd_gen_cpucaps = mkdir -p $(dir $@); $(AWK) -f $(real-prereqs) > $@

 quiet_cmd_gen_kernel_hwcap = GEN     $@
-      cmd_gen_kernel_hwcap = mkdir -p $(dir $@); /bin/sh -e $(real-prereqs) > $@
+      cmd_gen_kernel_hwcap = mkdir -p $(dir $@); sh -e $(real-prereqs) > $@

 quiet_cmd_gen_sysreg = GEN     $@
       cmd_gen_sysreg = mkdir -p $(dir $@); $(AWK) -f $(real-prereqs) > $@