Upgrade to libsoxr 0.0.2.

lib-src/libsoxr/cmake/Modules/TestBigEndian.cmake

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+# SoX Resampler Library       Copyright (c) 2007-12 robs@users.sourceforge.net
+# Licence for this file: LGPL v2.1                  See LICENCE for details.
+
+# - Macro to determine endian type
+#  test_big_endian (VARIABLE)
+#  VARIABLE - variable to store the result to
+
+macro (test_big_endian VARIABLE)
+  if ("HAVE_${VARIABLE}" MATCHES "^HAVE_${VARIABLE}$")
+    include (CheckCSourceRuns)
+    check_c_source_runs ("int main() {union {long i; char c[sizeof(long)];}
+      const u = {1}; return !!u.c[0];}" HAVE_${VARIABLE})
+    set (${VARIABLE} "${HAVE_${VARIABLE}}" CACHE INTERNAL "1 if system is big endian" FORCE)
+  endif ()
+endmacro ()