Now that test.pri adds source files and headers by default, the .pro files
of our tests need to append to SOURCES and HEADERS to ensure everything
test.pri adds to SOURCES and HEADERS are kept around.
The murmur_pch.h file which most tests use -- either directly,
or indrectly -- depends on being able to include OpenSSL headers.
Some of our tests did not include(qmake/openssl.pri), which meant that
those tests would fail to build in CONFIG(no-pch), such as on macOS.
This commit works around that issue by depending on OpenSSL for all tests.
