Add annotations about how to solve the problem of lua

- Add annotations about AdoptOpenJDK and lua binaries download link.
- Add annotations about how to solve problem that can't find 'libreadline.so.6' file during using lua.
  Reference link: electron-userland/electron-builder#993.

home/.profile

@@ -73,6 +73,7 @@ export CARGO_INSTALL_ROOT
 export PATH="$CARGO_HOME/bin:$CARGO_INSTALL_ROOT/bin:$PATH"
 
 # JDK ENV setting, recommend to use AdoptOpenJDK
+# Download from https://adoptopenjdk.net/releases.html
 JAVA_HOME=$APP/jdk/jdk8 # JDK8 env variable
 # JAVA_HOME=$APP/jdk/jdk11 # JDK11 env variable
 export JAVA_HOME
@@ -85,6 +86,14 @@ export PATH="$GRADLE_HOME/bin:$PATH"
 # Lua env
 LUA_HOME=$APP/lua
 export PATH="$LUA_HOME/bin:$PATH"
+# Download from http://luabinaries.sourceforge.net/download.html
+# Note: if you run `lua -v` display error.
+#   > lua: error while loading shared libraries:
+#     libreadline.so.6: cannot open shared object file: No such file or directory
+# Use the following command line to resolve:
+#   $ cd /lib/x86_64-linux-gnu
+#   $ ln -s libreadline.so.7.0 libreadline.so.6
+# Reference link: https://github.com/electron-userland/electron-builder/issues/993
 
 # Flutter ENV Setting
 export FLUTTER=$APP/flutter