- extend constructor to take new flag
- extend ExecutionEnvironment createMemoryManager with new flag
- only OsAgnosticMemoryManager changes in this step
Change-Id: I1dae4fd79fe28fd87e42b237600dc216c94b597e
- read only memory cannot be used for allocation,
Oses cannot create graphics alocation for such memory
- if memory allocation fails for host_ptr passed
to enqueueWrite calls, then try doing new allocation
and copy host_ptr on cpu
Change-Id: I415a4673ae1319ea8f77e53bd8fba7489fe85218