[qa] Add shell formatter to format shell scripts

Author: devkapilbansal

.editorconfig

@@ -0,0 +1,5 @@
+# config file for shell formatter
+
+[*]
+binary_next_line = true
+switch_case_indent = true

install-dev.sh

@@ -10,12 +10,12 @@ apt-get install -y lua5.1 liblua5.1-0-dev luarocks
 # install json-c
 apt-get install -y dh-autoreconf
 git clone https://github.com/json-c/json-c.git --depth=1
-cd json-c  && cmake . && make install && cd ..  || { echo 'Installing json-c failed!' ; exit 1; }
+cd json-c && cmake . && make install && cd .. || { echo 'Installing json-c failed!' && exit 1; }
 # install openwrt libubox and uci
 git clone https://git.openwrt.org/project/libubox.git --depth=1
-cd libubox && cmake . && make install && cd .. || { echo 'Installing libubox failed!' ; exit 1; }
+cd libubox && cmake . && make install && cd .. || { echo 'Installing libubox failed!' && exit 1; }
 git clone https://git.openwrt.org/project/uci.git --depth=1
-cd uci     && cmake . && make install && cd .. || { echo 'Installing uci failed!' ; exit 1; }
+cd uci && cmake . && make install && cd .. || { echo 'Installing uci failed!' && exit 1; }
 # update links to shared libraries
 ldconfig -v
 # install luafilesystem