Platform: HSW
Libva: staging branch 1fcd8cda3ed4e8491963533ef4c0f047de25e814
Intel-driver: staging branch add9ff7fee90144b0cd4b6d0d3240faffee49b69


Bug Info:
After the program, do not release the memory.

                                          Buffer     surface   picture    image
Base_Ext_Main_profile/FM1_FT_E.264        8          21        2          2
Mux_Stream/H264_352x240_frame45661.ts     0          21        2          2

Buffer 8 means the num of calling function vaCreateBuffer but not calling the function vaDestroyBuffer is 8 times.
surface  ——   vaCreateSurface
picture  ——   vaCreatePicture
image    ——   vaCreateImage

Reproduce steps:
Use LD_PRELOAD method to rewrite the source code, and print the calling infomation.
For example: 
1. LD_PRELOAD=va_memory_leak_checher.so mplayer -nosound -fps 30 -vo vaapi -va vaapi testcase 2>checker.2 >checker.1
2. the file checker.2 is the order of calling function.