net/sctp: Fix local variable declaration in dash

`local' builtin is problematic there is no POSIX equivalent [1].
Dash (unlike bash) supports only local varname (not local var=value)
Using the unsupported syntax leads to error:

    /opt/ltp/testcases/bin/sctp01.sh: 40: local: 65000: bad variable name

This is a quick fix, better than working with input parameters would be
to add another test case in runtest/net.features.

Fixes: 7ade6a3 ("sctp: add test-case with random payload")

[1] http://mywiki.wooledge.org/Bashism#Builtins

Signed-off-by: Petr Vorel <[email protected]>
Suggested-by: Cyril Hrubis <[email protected]>
Acked-by: Cyril Hrubis <[email protected]>

Author: pevik

testcases/network/sctp/sctp01.sh

@@ -37,7 +37,9 @@ setup()
 
 test_run()
 {
-	local opts="$@"
+	local opts
+
+	opts="$@"
 
 	tst_resm TINFO "compare TCP/SCTP performance"