SWDEV-436821 Update hip samples Readme files

Change-Id: I6bf3a72eac4a4242cb2dbf4e6eee73e0e1bef2ef

samples/2_Cookbook/7_streams/Readme.md

@@ -49,8 +49,17 @@ and while kernel launch, we make the following changes in 5th parameter to hipLa
 here we replaced 4th parameter with amount of additional shared memory to allocate when launching the kernel.
 
 ## How to build and run:
-Use the make command and execute it using ./exe
-Use hipcc to build the application, which is using hcc on AMD and nvcc on nvidia.
+- Build the sample using cmake
+```
+$ mkdir build; cd build
+$ cmake .. -DCMAKE_PREFIX_PATH=/opt/rocm
+$ make
+```
+- Execute the sample
+```
+$ ./stream
+stream PASSED!
+```
 
 ## More Info:
 - [HIP FAQ](https://github.com/ROCm-Developer-Tools/HIP/blob/master/docs/markdown/hip_faq.md)