Update document for iwasm/wamrc dependent packages (#2183)

Author: TianlongLiang

product-mini/README.md

@@ -18,14 +18,17 @@ Note that all ESP-IDF toolchain files live under `$IDF_PATH/tools/cmake/`.
 ## Linux
 
 First of all please install the dependent packages.
-Run command below in Ubuntu-18.04:
-
+Run command below in Ubuntu-22.04:
+``` Bash
+sudo apt install build-essential cmake g++-multilib libgcc-11-dev lib32gcc-11-dev ccache
+```
+Or in Ubuntu-20.04
 ``` Bash
-sudo apt install build-essential cmake g++-multilib libgcc-8-dev lib32gcc-8-dev
+sudo apt install build-essential cmake g++-multilib libgcc-9-dev lib32gcc-9-dev ccache
 ```
-Or in Ubuntu-16.04:
+Or in Ubuntu-18.04:
 ``` Bash
-sudo apt install build-essential cmake g++-multilib libgcc-5-dev lib32gcc-5-dev
+sudo apt install build-essential cmake g++-multilib libgcc-8-dev lib32gcc-8-dev ccache
 ```
 Or in Fedora:
 ``` Bash

wamr-compiler/README.md

@@ -1,7 +1,15 @@
 
 ### Build wamrc AOT compiler
 
-Both wasm binary file and AOT file are supported by iwasm. The wamrc AOT compiler is to compile wasm binary file to AOT file which can also be run by iwasm. Execute following commands to build **wamrc** compiler for Linux:
+Both wasm binary file and AOT file are supported by iwasm. The wamrc AOT compiler is to compile wasm binary file to AOT file which can also be run by iwasm. You can execute following commands to build **wamrc** compiler:
+
+For **Linux**(Ubuntu 20.04 as an example):
+
+First, make sure necessary dependency are installed:
+
+```shell
+sudo apt-get install git build-essential cmake g++-multilib libgcc-9-dev lib32gcc-9-dev ccache 
+```
 
 ```shell
 cd wamr-compiler
@@ -13,11 +21,12 @@ make
 ```
 
 For **Windows**：
+
 ```shell
 cd wamr-compiler
 python build_llvm.py
 mkdir build && cd build
 cmake ..
 cmake --build . --config Release
 # wamrc.exe is generated under .\Release directory
-```
+```