add benchmarks for non-fundamental Scalar types for VectorT

Status Job ID Name Coverage
  Test
passed #252
Linux
clang-c++11

00:11:47

passed #254
Linux
clang-c++98

00:09:06

passed #251
Linux
gcc-c++11

00:18:05

passed #253
Linux
gcc-c++98

00:11:13

passed #255
Apple
macos-c++11

00:05:42

passed #256
Apple
macos-c++98

00:05:04