Re-generate gtest-param-test.h from gtest-param-test.h.pump

Commit 6a26e47cfcc174cc85651cbde0b0158d03321e2f changed the formatting
of INSTANTIATE_TEST_CASE_P() in the generated header file only.

This commit reverts to the formatting produced by running "pump
gtest-param-test.h.pump", which seems to be more consistent with the
rest of the file.