Fix typo in configure script.

configure

@@ -5294,8 +5294,8 @@ $as_echo "$as_me: Boost.System LIB: $BOOST_SYSTEM_LIB" >&6;}
       LIBS="$BOOST_SYSTEM_LIB $LIBS"
 fi
 
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to compile using libtorrent-raser 0.16.x" >&5
-$as_echo_n "checking whether to compile using libtorrent-raser 0.16.x... " >&6; }
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to compile using libtorrent-rasterbar 0.16.x" >&5
+$as_echo_n "checking whether to compile using libtorrent-rasterbar 0.16.x... " >&6; }
 case "x$with_libtorrent_rasterbar0_16" in #(
   "xno") :
     { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5

configure.ac

@@ -181,7 +181,7 @@ AS_IF([test "x$BOOST_SYSTEM_LIB" = "x"],
       [AC_MSG_NOTICE([Boost.System LIB: $BOOST_SYSTEM_LIB])
       LIBS="$BOOST_SYSTEM_LIB $LIBS"])
 
-AC_MSG_CHECKING([whether to compile using libtorrent-raser 0.16.x])
+AC_MSG_CHECKING([whether to compile using libtorrent-rasterbar 0.16.x])
 AS_CASE(["x$with_libtorrent_rasterbar0_16"],
         ["xno"],
               [AC_MSG_RESULT([no])