QError: Introduce QERR_IO_ERROR

Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>

qerror.c

@@ -148,6 +148,10 @@ static const QErrorStringTable qerror_table[] = {
         .error_fmt = QERR_INVALID_PASSWORD,
         .desc      = "Password incorrect",
     },
+    {
+        .error_fmt = QERR_IO_ERROR,
+        .desc      = "An IO error has occurred",
+    },
     {
         .error_fmt = QERR_JSON_PARSING,
         .desc      = "Invalid JSON syntax",

qerror.h

@@ -126,6 +126,9 @@ QError *qobject_to_qerror(const QObject *obj);
 #define QERR_INVALID_PASSWORD \
     "{ 'class': 'InvalidPassword', 'data': {} }"
 
+#define QERR_IO_ERROR \
+    "{ 'class': 'IOError', 'data': {} }"
+
 #define QERR_JSON_PARSING \
     "{ 'class': 'JSONParsing', 'data': {} }"