[glibc/maskray/unnest] testrun.sh: Add support for --tool=rpctrace

[glibc/maskray/unnest] testrun.sh: Add support for --tool=rpctrace

[Fangrui Song]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=27ae52e4d149fc2dc5ef109426753ad3d5126582

commit 27ae52e4d149fc2dc5ef109426753ad3d5126582
Author: Sergey Bugaev <bugaevc@gmail.com>
Date:   Tue Sep 7 16:33:25 2021 +0300

    testrun.sh: Add support for --tool=rpctrace
    
    rpctrace(1) is a Hurd RPC tracer tool, which is used similar to how
    strace(1) is used on GNU/Linux.
    
    Signed-off-by: Sergey Bugaev <bugaevc@gmail.com>
    Message-Id: <20210907133325.255690-6-bugaevc@gmail.com>
    Acked-by: Florian Weimer <fweimer@redhat.com>
    Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>

Diff:
---
 Makefile | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/Makefile b/Makefile
index f98d5a9e67..a49870d3d1 100644
--- a/Makefile
+++ b/Makefile
@@ -141,8 +141,9 @@ usage () {
 cat << EOF
 Usage: $$0 [OPTIONS] <program> [ARGUMENTS...]
 
-  --tool=TOOL  Run with the specified TOOL. It can be strace, valgrind or
-               container. The container will run within support/test-container.
+  --tool=TOOL  Run with the specified TOOL. It can be strace, rpctrace,
+               valgrind or container. The container will run within
+               support/test-container.
 EOF
 
   exit 1
@@ -177,6 +178,10 @@ case "$$toolname" in
     exec strace $(patsubst %, -E%, $(run-program-env)) \
       $(test-via-rtld-prefix) $${1+"$$@"}
     ;;
+  rpctrace)
+    exec rpctrace $(patsubst %, -E%, $(run-program-env)) \
+      $(test-via-rtld-prefix) $${1+"$$@"}
+    ;;
   valgrind)
     exec env $(run-program-env) valgrind $(test-via-rtld-prefix) $${1+"$$@"}
     ;;