qemu-linux-user does not support ptrace, disable tests that depend on it

Index: elfutils-0.166/tests/Makefile.am
===================================================================
--- elfutils-0.166.orig/tests/Makefile.am
+++ elfutils-0.166/tests/Makefile.am
@@ -121,7 +121,7 @@ TESTS = run-arextract.sh run-arsymtest.s
 	run-stack-demangled-test.sh run-readelf-zx.sh run-readelf-zp.sh \
 	run-readelf-dwz-multi.sh run-allfcts-multi.sh run-deleted.sh \
 	run-linkmap-cut.sh run-aggregate-size.sh vdsosyms run-readelf-A.sh \
-	run-getsrc-die.sh run-strptr.sh newdata elfstrtab dwfl-proc-attach \
+	run-getsrc-die.sh run-strptr.sh newdata elfstrtab \
 	elfshphehdr run-lfs-symbols.sh run-dwelfgnucompressed.sh \
 	run-elfgetchdr.sh \
 	run-elfgetzdata.sh run-elfputzdata.sh run-zstrptr.sh \
Index: elfutils-0.166/tests/backtrace-subr.sh
===================================================================
--- elfutils-0.166.orig/tests/backtrace-subr.sh
+++ elfutils-0.166/tests/backtrace-subr.sh
@@ -93,6 +93,11 @@ check_native_unsupported()
       fi
     ;;
   esac
+
+  if egrep 'qemu: Unsupported syscall' $err; then
+    echo >&2 $testname: qemu-linux-user does not support ptrace
+    exit 77
+  fi
 }
 
 check_core()