multimedia/cmrt: pacify -Wmacro-redefined

In file included from cm_program.cpp:30:
In file included from ./cm_device.h:37:
In file included from ./cm_array.h:31:
./cm_mem.h:44:9: warning: 'fastcall' macro redefined [-Wmacro-redefined]
#define fastcall

^

/usr/include/sys/cdefs.h:383:9: note: previous definition is here
#define fastcall attribute((fastcall__))

^

In file included from cm_task.cpp:29:
In file included from ./cm_task.h:29:
In file included from ./cm_def.h:42:
In file included from ./cm_common.h:32:
In file included from ./oscl_impl_linux.h:34:
./oscl_platform_def.h:34:9: warning: 'UINT_MAX' macro redefined [-Wmacro-redefined]
#define UINT_MAX 0xffffffff

^

/usr/include/sys/limits.h:59:9: note: previous definition is here
#define UINT_MAX __UINT_MAX /* max value for an unsigned int */

^