Delete temp files if compiled successfully
Delete temp files if compiled successfully

If IR was compiled successfully, delete temp files.
My '/tmp' was full of '*.cl', '*.ll' files.
Now the temp files are gone, world is clean :)

Signed-off-by: Homer Hsing <f17cb7083eb6a94c3fb9d8f09ceefa518f721ab2@intel.com>
Reviewed-by: Lu Guanqun <2dad72ae5fe48bf7bd43ddccece96ab3f4a6c25d@intel.com>

ignatenkobrain/beignet,zhenyw/beignet,ignatenkobrain/beignet,ignatenkobrain/beignet,wdv4758h/beignet,freedesktop-unofficial-mirror/beignet,freedesktop-unofficial-mirror/beignet,ignatenkobrain/beignet,ignatenkobrain/beignet,freedesktop-unofficial-mirror/beignet,freedesktop-unofficial-mirror/beignet,zhenyw/beignet,zhenyw/beignet,zhenyw/beignet,wdv4758h/beignet,wdv4758h/beignet,wdv4758h/beignet,wdv4758h/beignet,zhenyw/beignet