+ Add support for universal builds to vasnprintf.
+ * m4/printf.m4 (gl_PRINTF_ENOMEM): Require gl_MULTIARCH. In Apple
+ universal builds, guess no.
+ * modules/vasnprintf-posix (Depends-on): Add multiarch.
+ * modules/vasprintf-posix (Depends-on): Likewise.
+ * modules/fprintf-posix (Depends-on): Likewise.
+ * modules/vfprintf-posix (Depends-on): Likewise.
+ * modules/snprintf-posix (Depends-on): Likewise.
+ * modules/vsnprintf-posix (Depends-on): Likewise.
+ * modules/sprintf-posix (Depends-on): Likewise.
+ * modules/vsprintf-posix (Depends-on): Likewise.
+ * modules/unistdio/u8-vasnprintf (Depends-on): Likewise.
+ * modules/unistdio/u8-u8-vasnprintf (Depends-on): Likewise.
+ * modules/unistdio/u16-vasnprintf (Depends-on): Likewise.
+ * modules/unistdio/u16-u16-vasnprintf (Depends-on): Likewise.
+ * modules/unistdio/u32-vasnprintf (Depends-on): Likewise.
+ * modules/unistdio/u32-u32-vasnprintf (Depends-on): Likewise.
+ * modules/unistdio/ulc-vasnprintf (Depends-on): Likewise.
+