avoid duplicate basename(3) calls

Problem: log_init() already calls basename(3) on its argument
but some users do another one.

Drop extra basename.

t/kvs/commit.c

@@ -130,7 +130,7 @@ int main (int argc, char *argv[])
     tstat_t ts;
     struct timespec t0;
 
-    log_init (basename (argv[0]));
+    log_init (argv[0]);
 
     while ((ch = getopt_long (argc, argv, OPTIONS, longopts, NULL)) != -1) {
         switch (ch) {

t/kvs/fence_api.c

@@ -137,7 +137,7 @@ int main (int argc, char *argv[])
     thd_t *thd;
     int i, ch, num, rc;
 
-    log_init (basename (argv[0]));
+    log_init (argv[0]);
 
     while ((ch = getopt_long (argc, argv, OPTIONS, longopts, NULL)) != -1) {
         switch (ch) {

t/kvs/fence_invalid.c

@@ -45,7 +45,7 @@ int main (int argc, char *argv[])
     flux_kvs_txn_t *txn1 = NULL;
     flux_kvs_txn_t *txn2 = NULL;
 
-    log_init (basename (argv[0]));
+    log_init (argv[0]);
 
     if (argc != 2)
         usage ();

t/kvs/fence_namespace_remove.c

@@ -46,7 +46,7 @@ int main (int argc, char *argv[])
     flux_future_t *f = NULL;
     flux_kvs_txn_t *txn = NULL;
 
-    log_init (basename (argv[0]));
+    log_init (argv[0]);
 
     if (argc != 3)
         usage ();

t/kvs/lookup_invalid.c

@@ -34,7 +34,7 @@ int main (int argc, char *argv[])
     char *key = NULL;
     flux_future_t *f = NULL;
 
-    log_init (basename (argv[0]));
+    log_init (argv[0]);
 
     if (argc != 2)
         usage ();

t/kvs/transactionmerge.c

@@ -122,7 +122,7 @@ int main (int argc, char *argv[])
     flux_reactor_t *r;
     int i, rc, ch;
 
-    log_init (basename (argv[0]));
+    log_init (argv[0]);
 
     while ((ch = getopt_long (argc, argv, OPTIONS, longopts, NULL)) != -1) {
         switch (ch) {