Added example build script for Android armeabi-v7a NEON hardware FPU

examples/targets/build_config_android_armeabi_v7a_neon_hard.rb

@@ -0,0 +1,28 @@
+MRuby::Build.new do |conf|
+
+  # Gets set by the VS command prompts.
+  if ENV['VisualStudioVersion'] || ENV['VSINSTALLDIR']
+    toolchain :visualcpp
+  else
+    toolchain :gcc
+  end
+
+  enable_debug
+
+  # include the default GEMs
+  conf.gembox 'default'
+end
+
+# Requires Android NDK r13 or later.
+MRuby::CrossBuild.new('android-armeabi-v7a-neon-hard') do |conf|
+  params = {
+    :arch => 'armeabi-v7a',
+    :mfpu => 'neon',
+    :mfloat_abi => 'hard',
+    :platform => 'android-24',
+    :toolchain => :clang,
+  }
+  toolchain :android, params
+
+  conf.gembox 'default'
+end