Increase timeout for tests while running under valgrind
Increase timeout for tests while running under valgrind

 - The tests seems to take longer time while running under
   valgrind.

 - Added '-t' argument for the meson tests which increases the
   time out value by a mentioned multiplier value for each test
   while running under valgrind.

 - Set the multiplier value to 10, so that we can wait for 300 seconds
   before we timeout for tests that runs under valgrind.

Signed-off-by: Manojkiran Eda <58c0f11b20f4eee4270d60d1871d69f99fda7b66@gmail.com>
Change-Id: I29f3e40da388b732b37bdeb03155111de35bbce3

openbmc/openbmc-build-scripts,openbmc/openbmc-build-scripts