app: fix usage help of options separated by dashes

The EAL options and app-specific options are separated
with double dashes.

The help of testpmd, test-acl and pdump were missing
the dashes after EAL options.
Note: testpmd was completely missing the EAL options.

Fixes: af75078fec ("first public release")
Fixes: 26c057ab6c ("acl: new test-acl application")
Fixes: b2854d5317 ("app/pdump: support multi-core capture")
Cc: stable@dpdk.org

Signed-off-by: Thomas Monjalon <thomas@monjalon.net>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>

app/pdump/main.c

@@ -151,7 +151,7 @@ static uint8_t multiple_core_capture;
 static void
 pdump_usage(const char *prgname)
 {
-	printf("usage: %s [EAL options]"
+	printf("usage: %s [EAL options] --"
 			" --["CMD_LINE_OPT_MULTI"]\n"
 			" --"CMD_LINE_OPT_PDUMP" "
 			"'(port=<port id> | device_id=<pci id or vdev name>),"

app/test-acl/main.c

@@ -12,7 +12,7 @@
 #include <rte_lcore.h>
 #include <rte_ip.h>
 
-#define	PRINT_USAGE_START	"%s [EAL options]\n"
+#define	PRINT_USAGE_START	"%s [EAL options] --\n"
 
 #define	RTE_LOGTYPE_TESTACL	RTE_LOGTYPE_USER1
 

app/test-pmd/parameters.c

@@ -49,7 +49,7 @@
 static void
 usage(char* progname)
 {
-	printf("usage: %s "
+	printf("usage: %s [EAL options] -- "
 #ifdef RTE_LIBRTE_CMDLINE
 	       "[--interactive|-i] "
 	       "[--cmdline-file=FILENAME] "