Initial version of 7 track standard cells for the GF180MCU PDK.

Signed-off-by: Tim 'mithro' Ansell <tansell@google.com>
Signed-off-by: Karthik Chandrasekaran <karthik.chandrasekaran@globalfoundries.com>
Signed-off-by: Mohamed Kassem´┐╝<mkk@efabless.com>