Sync gmock-generated-nice-strict.h.pump with gmock-generated-nice-strict.h.

Commit fe402c27790ff1cc9a7e17c5d0aea4ebe7fd8a71 published the changes in
internal CL 156157936, but missed the diff in
gmock-generated-nice-strict.h.pump. This makes it difficult to reason
about the change, because the .pump file is more concise than the
generated file.

This PR was tested by re-generating the .h file using the command below
and checking the git diff.

./googletest/scripts/pump.py \

googlemock/include/gmock/gmock-generated-nice-strict.h.pump