Remove cppcheck and vera++ from prerequisites

Rely on platform-provided versions. Thus, no need to download and
build them, neither to wrap them with shell scripts. CMake and
precommit updated to call the new tools. Development documentation
also updated/simplified.

PS: On my Ubuntu 14.04.3, cppcheck has version 1.61, while prereq
version was 1.69. The older version reports and fails on a strange
style issue in ecma/builtin-objects/ecma-builtin-helpers.cpp, for
which the only solution found was to suppress the cppcheck errors
with `variableScope` id for that file.

JerryScript-DCO-1.0-Signed-off-by: Akos Kiss akiss@inf.u-szeged.hu

docs/DEVELOPMENT.md

@@ -1,6 +1,6 @@
 ## Development
 ### Setting Up Prerequisites
-Currently, only Ubuntu 14.04+ officially supported as primary development environment.
+Currently, only Ubuntu 14.04+ is officially supported as primary development environment.
 
 There are several dependencies, that should be installed manually. The following list is required for building:
 - `gcc` or `g++` higher than `4.8.2`
@@ -9,24 +9,15 @@ There are several dependencies, that should be installed manually. The following
 - `cmake` higher than `2.8.12.2`
 - `make` higher than `3.81`
 - `bash` higher than `4.3.11`
+- `cppcheck` higher than 1.61
+- `vera++` higher than 1.2.1
 
 ```bash
-sudo apt-get install gcc g++ gcc-arm-none-eabi cmake
-```
-
-These tools are required for development:
-- `cppcheck` requires `libpcre`
-- `vera++` requires `tcl`, `tk` and `boost`
-
-```bash
-sudo apt-get install libpcre3 libpcre3-dev
-sudo apt-get install tcl8.6 tcl8.6-dev tk8.6-dev libboost-all-dev
+sudo apt-get install gcc g++ gcc-arm-none-eabi cmake cppcheck vera++
 ```
 
 Upon first build, `make` would try to setup prerequisites, required for further development and pre-commit testing:
 - STM32F3 and STM32F4 libraries
-- cppcheck 1.66
-- vera++ 1.2.1
 
 ```bash
 make prerequisites -j