SWDEV-436821 Update hip samples Readme files

Change-Id: I6bf3a72eac4a4242cb2dbf4e6eee73e0e1bef2ef


[ROCm/hip-tests commit: 76dd8ea569]

projects/hip-tests/samples/0_Intro/square/README.md

@@ -3,19 +3,16 @@
 Simple test below is an example, shows how to use hipify-perl to port CUDA code to HIP:
 
 - Add hip/bin path to the PATH
-
 ```
 $ export PATH=$PATH:[MYHIP]/bin
 ```
 
 - Define environment variable
-
 ```
 $ export HIP_PATH=[MYHIP]
 ```
 
 - Build executable file
-
 ```
 $ cd ~/hip/samples/0_Intro/square
   mkdir -p build && cd build