Removing package dependency to thunk

The current state of hsa-rocr does
NOT requires thunk lib as its dependency.
Its unnecessary pulling thunk package while
installing rocr. This patch corrects
the same

Change-Id: Id98ede8b66ffd9aaf4a47da96ba2f981f4c3da73


[ROCm/ROCR-Runtime commit: a229f5c320]

projects/rocr-runtime/runtime/hsa-runtime/cmake_modules/utils.cmake

@@ -217,3 +217,17 @@ function ( listsubdirs DIRPATH SUBDIRECTORIES )
     endforeach()
     set (${SUBDIRECTORIES} ${FOLDERS} PARENT_SCOPE)
 endfunction()
+
+## Sets el7 flag to be true
+function ( Checksetel7 EL7_DISTRO )
+execute_process(COMMAND rpm --eval %{?dist}
+                 RESULT_VARIABLE PROC_RESULT
+                 OUTPUT_VARIABLE EVAL_RESULT
+                 OUTPUT_STRIP_TRAILING_WHITESPACE)
+message("RESULT_VARIABLE ${PROC_RESULT} OUTPUT_VARIABLE: ${EVAL_RESULT}")
+if(PROC_RESULT EQUAL "0" AND NOT EVAL_RESULT STREQUAL "")
+  if( "${EVAL_RESULT}" STREQUAL ".el7")
+     set (${EL7_DISTRO} TRUE PARENT_SCOPE)
+  endif()
+endif()
+endfunction()