bump(main/dash): 0.5.13.4

[TomJo2000]

Had to add ac_cv_func_wait3=yes to get it to build now.
This seems to have been caused by da72f698 which has been in dash since 0.5.13.

Still needs validation testing on-device since this is an essential package and provides our sh.

[TomJo2000]

Setting ac_cv_func_wait3 causes HAVE_WAIT3 to be defined which puts us back into the codepath from dash <0.5.13.

Here's the relevant hunks from the upstream commit.

da72f69 shell: Add VxWorks support
diff --git a/configure.ac b/configure.ac
index ba4856a..bb09534 100644
--- a/configure.ac
+++ b/configure.ac
@@ -44,7 +44,7 @@ AC_ARG_ENABLE(glob, AS_HELP_STRING(--enable-glob, [Use glob(3) from libc]))
 dnl Checks for libraries.
 
 dnl Checks for header files.
-AC_CHECK_HEADERS(alloca.h paths.h)
+AC_CHECK_HEADERS(alloca.h paths.h sys/wait.h)
 
 dnl Check for declarations
 AC_CHECK_DECL([_PATH_BSHELL],,AC_DEFINE_UNQUOTED([_PATH_BSHELL], "/bin/sh", [Define to system shell path]),[
@@ -89,7 +89,7 @@ dnl Checks for library functions.
 AC_CHECK_FUNCS(bsearch faccessat getpwnam getrlimit isalpha killpg \
 	       memfd_create memrchr mempcpy \
 	       sigsetmask stpcpy strchrnul strsignal strtod strtoimax \
-	       strtoumax sysconf tee)
+	       strtoumax sysconf tee wait3)
 
 dnl Check whether it's worth working around FreeBSD PR kern/125009.
 dnl The traditional behavior of access/faccessat is crazy, but
diff --git a/src/jobs.c b/src/jobs.c
index 83d9694..143f15c 100644
--- a/src/jobs.c
+++ b/src/jobs.c
@@ -1199,7 +1199,11 @@ waitproc(int block, int *status)
 	do {
 		gotsigchld = 0;
 		do
+#ifdef HAVE_WAIT3
 			err = wait3(status, flags, NULL);
+#else
+			err = waitpid((pid_t)-1, status, flags, NULL);
+#endif
 		while (err < 0 && errno == EINTR);
 
 		if (err || (err = -!block))