add OUTPUT_HASPID option

该参数用于控制llvmprof.out输出文件名中是否包含pid,以避免MPI程序都写入一
个文件时候的冲突.

Signed-off-by: xiehuc <xiehuc@gmail.com>
add include dir in src/CMakeLists.txt

Signed-off-by: root3 <root3@root3-Server.(none)>
Merge branch 'master' of /home/root3/REPOS/llvm-prof

Conflicts:
	libprofile/CMakeLists.txt

Signed-off-by: root3 <root3@root3-Server.(none)>