tests: use a fixed chardev TLS path

The test qemuxml2argv-serial-tcp-tlsx509-chardev.args
will fail if libvirt is built with a --sysconfdir
arg that is not /etc.  Fix this by setting a hardcoded
path in the test code.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

tests/qemuxml2argvdata/qemuxml2argv-serial-tcp-tlsx509-chardev.args

@@ -25,8 +25,8 @@ server,nowait \
 -chardev udp,id=charserial0,host=127.0.0.1,port=2222,localaddr=127.0.0.1,\
 localport=1111 \
 -device isa-serial,chardev=charserial0,id=serial0 \
--object tls-creds-x509,id=objserial1_tls0,dir=/etc/pki/qemu,endpoint=client,\
-verify-peer=no \
+-object tls-creds-x509,id=objserial1_tls0,dir=/etc/pki/libvirt-chardev,\
+endpoint=client,verify-peer=no \
 -chardev socket,id=charserial1,host=127.0.0.1,port=5555,\
 tls-creds=objserial1_tls0 \
 -device isa-serial,chardev=charserial1,id=serial1 \

tests/qemuxml2argvtest.c

@@ -515,12 +515,18 @@ mymain(void)
 
     driver.privileged = true;
 
+    VIR_FREE(driver.config->defaultTLSx509certdir);
+    if (VIR_STRDUP_QUIET(driver.config->defaultTLSx509certdir, "/etc/pki/qemu") < 0)
+        return EXIT_FAILURE;
     VIR_FREE(driver.config->vncTLSx509certdir);
     if (VIR_STRDUP_QUIET(driver.config->vncTLSx509certdir, "/etc/pki/libvirt-vnc") < 0)
         return EXIT_FAILURE;
     VIR_FREE(driver.config->spiceTLSx509certdir);
     if (VIR_STRDUP_QUIET(driver.config->spiceTLSx509certdir, "/etc/pki/libvirt-spice") < 0)
         return EXIT_FAILURE;
+    VIR_FREE(driver.config->chardevTLSx509certdir);
+    if (VIR_STRDUP_QUIET(driver.config->chardevTLSx509certdir, "/etc/pki/libvirt-chardev") < 0)
+        return EXIT_FAILURE;
 
     VIR_FREE(driver.config->stateDir);
     if (VIR_STRDUP_QUIET(driver.config->stateDir, "/nowhere") < 0)