add another test-Tmax and test-Rand

add float_add, mix_add, rand_add inst template

Signed-off-by: xiehuc <xiehuc@gmail.com>
add clock_gettime(testing)
combine rdtsc and clock_gettime(testing)
WITH_DEBUG default switch ON, to enable Assert macro

Signed-off-by: xiehuc <xiehuc@gmail.com>
add test-fadd.c to test fadd(still working)
Merge branch 'master' of https://github.com/xiehuc/llvm-pred