Fix variable for RPM build

Certain versions of rpmbuild need the variable to be outside of curly
braces. This addresses that issue in that situation.

Change-Id: Iff7200b332b9d8e41a4d7676ca14c5a32c075beb


[ROCm/ROCR-Runtime commit: 4e4d4a81e1]

projects/rocr-runtime/RPM/libhsakmt.spec

@@ -18,7 +18,7 @@ for AMD KFD
 %setup -T -D -c -n %{name}
 
 %install
-cp -R %{thunkroot}/build/rpm/libhsakmt $RPM_BUILD_ROOT
+cp -R %thunkroot/build/rpm/libhsakmt $RPM_BUILD_ROOT
 find $RPM_BUILD_ROOT \! -type d | sed "s|$RPM_BUILD_ROOT||"> thunk.list
 
 %clean