Android: always sort list of NDK toolchains

Order returned by CMake is unreliable but we need clang to go after gcc for
automatic toolchain selection.

android/android.toolchain.cmake

@@ -596,6 +596,9 @@ if( BUILD_WITH_ANDROID_NDK )
  endif()
  if( NOT __availableToolchains )
   file( GLOB __availableToolchains RELATIVE "${ANDROID_NDK}/toolchains" "${ANDROID_NDK}/toolchains/*" )
+  if( __availableToolchains )
+   list(SORT __availableToolchains) # we need clang to go after gcc
+  endif()
   __LIST_FILTER( __availableToolchains "^[.]" )
   __LIST_FILTER( __availableToolchains "llvm" )
   __GLOB_NDK_TOOLCHAINS( __availableToolchains )