[PATCH 2/2] tests/vhost-user-bridge.c: Fix const qualifier build errors with recent glibc

["Cédric Le Goater" <clg@redhat.com>]

A recent change in glibc 2.42.9000 [1] changes the return type of
strstr() and other string functions to be 'const char *' when the
input is a 'const char *'. This breaks the build in :

../tests/vhost-user-bridge.c: In function ‘vubr_parse_host_port’:
../tests/vhost-user-bridge.c:749:15: error: initialization discards ‘const’ qualifier from pointer target type [-Werror=discarded-qualifiers]
  749 |     char *p = strchr(buf, ':');
      |               ^~~~~~

Fix this by using the glib g_strsplit() routine instead of strdup().

[1] https://sourceware.org/git/?p=glibc.git;a=commit;h=cd748a63ab1a7ae846175c532a3daab341c62690

Suggested-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
 tests/vhost-user-bridge.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/tests/vhost-user-bridge.c b/tests/vhost-user-bridge.c
index a5c711b1de8e9c164dd1614f4329b8e3c05d0402..ce4c3426d3938a0b54195f3e95bb1f1c3c4ae823 100644
--- a/tests/vhost-user-bridge.c
+++ b/tests/vhost-user-bridge.c
@@ -746,14 +746,12 @@ vubr_run(VubrDev *dev)
 static int
 vubr_parse_host_port(const char **host, const char **port, const char *buf)
 {
-    char *p = strchr(buf, ':');
-
-    if (!p) {
+    g_auto(GStrv) tokens = g_strsplit(buf, ":", 2);
+    if (!tokens[0] || !tokens[1]) {
         return -1;
     }
-    *p = '\0';
-    *host = strdup(buf);
-    *port = strdup(p + 1);
+    *host = g_steal_pointer(&tokens[0]);
+    *port = g_steal_pointer(&tokens[1]);
     return 0;
 }
 
-- 
2.52.0