support: Use support_record_failure consistently

This causes more test programs to link in the support_record_failure
function, which triggers an early call to mmap from an ELF
constructor, but this should not have side effects intefering
with the functionality actually under test (unlike, say, a call
to malloc).

support/xasprintf.c

@@ -21,6 +21,7 @@
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <support/check.h>
 
 char *
 xasprintf (const char *format, ...)
@@ -29,10 +30,7 @@ xasprintf (const char *format, ...)
   va_start (ap, format);
   char *result;
   if (vasprintf (&result, format, ap) < 0)
-    {
-      printf ("error: asprintf: %m\n");
-      exit (1);
-    }
+    FAIL_EXIT1 ("asprintf: %m");
   va_end (ap);
   return result;
 }