Add back build/config/uuid.m4 missed from reversion

This finishes reverting commit 04aac8c9.

build/config/uuid.m4

+AC_DEFUN([CHECK_LIBUUID],
+	[
+	PKG_CHECK_MODULES([LIBUUID], [uuid >= 1.41.2],
+			  [LIBUUID_FOUND=yes], [LIBUUID_FOUND=no])
+	if test "$LIBUUID_FOUND" = "no" ; then
+	    PKG_CHECK_MODULES([LIBUUID], [uuid],
+			      [LIBUUID_FOUND=yes], [LIBUUID_FOUND=no])
+	    if test "$LIBUUID_FOUND" = "no" ; then
+		 AC_MSG_WARN([libuuid development package highly recommended!])
+	    else
+		LIBUUID_INCLUDEDIR=$(pkg-config --variable=includedir uuid)
+		LIBUUID_CFLAGS+=" -I$LIBUUID_INCLUDEDIR/uuid "
+	    fi
+	fi
+	AC_SUBST([LIBUUID_CFLAGS])
+	AC_SUBST([LIBUUID_LIBS])
+	])