The blis.h header file includes a lot of BLIS internal definitions. Some of these caused problems
when using a BLIS library compiled with clang on Windows from an applications compiled with
the Intel icc and icx compilers. Workaround is to use "#ifdef BLIS_IS_BUILDING_LIBRARY" to
guard these definitions from being exposed to applications including blis.h. (The BLIS configure
and cmake builds systems automatically define BLIS_IS_BUILDING_LIBRARY only for compiling
the BLIS library.)
This patch implements the minimum changes to resolve the issue. Longer term, similar changes
may need to be added around all BLIS internal definitions in blis.h.
AMD-Internal: [CPUPL-6953]
4bc5287f72