ISPC: Suffix for Generated Headers configurable plus a better default
The target property ISPC_HEADER_SUFFIX
and associated global
variable now can control the suffix used when generating the
C/C++ interoperability ISPC headers.
In addition the default suffix is now "_ispc.h" which matches the common convention that the ISPC compiler team uses and recommends.
Backport: release
Edited by Brad King