Fix time reporting in SPMV merge-path test: don't scale times by 0.001

[brian-kelley]

This way, times are reported in seconds. Since no units are printed this is what the user would expect to see.

[brian-kelley]

#######################################################
PASSED TESTS
#######################################################
clang-8.0-Cuda_OpenMP-release build_time=644 run_time=176
clang-8.0-Pthread_Serial-release build_time=231 run_time=125
clang-9.0.0-Pthread-release build_time=125 run_time=55
clang-9.0.0-Serial-release build_time=136 run_time=63
cuda-10.1-Cuda_OpenMP-release build_time=870 run_time=198
cuda-9.2-Cuda_Serial-release build_time=781 run_time=190
gcc-4.8.4-OpenMP-release build_time=133 run_time=63
gcc-7.3.0-OpenMP-release build_time=147 run_time=62
gcc-7.3.0-Pthread-release build_time=130 run_time=57
gcc-8.3.0-Serial-release build_time=154 run_time=66
gcc-9.1-OpenMP-release build_time=194 run_time=62
gcc-9.1-Serial-release build_time=186 run_time=62
intel-17.0.1-Serial-release build_time=262 run_time=57
intel-18.0.5-OpenMP-release build_time=382 run_time=55
intel-19.0.5-Pthread-release build_time=470 run_time=54