Fixing test to consider statically linked binaries (#10835)

The test calls `ldd` on `redis-server` in order to find out whether the binary
was linked against `libmusl`; However, `ldd` returns a value different from `0`
when statically linking the binaries agains libc-musl, because `redis-server` is
not a dynamic executable (as given by the exception thrown by the failing test),
and `make test` terminates with an error::

   $ ldd src/redis-server
       not a dynamic executable
   $ echo $?
   1

This commit fixes the test by ignoring such failures.

Co-authored-by: Yossi Gottlieb <yossigo@gmail.com>

tests/integration/logging.tcl

@@ -8,9 +8,12 @@ if {$system_name eq {darwin}} {
     set backtrace_supported 1
 } elseif {$system_name eq {linux}} {
     # Avoid the test on libmusl, which does not support backtrace
-    set ldd [exec ldd src/redis-server]
-    if {![string match {*libc.*musl*} $ldd]} {
-        set backtrace_supported 1
+    # and on static binaries (ldd exit code 1) where we can't detect libmusl
+    catch {
+        set ldd [exec ldd src/redis-server]
+        if {![string match {*libc.*musl*} $ldd]} {
+            set backtrace_supported 1
+        }
     }
 }