require -fPIC on arm64 in addition to x86_64 and arm With gcc-8, a-c-c now fails to build its test cases with a relocation error on arm64.  Add arm64 to the list of archs where we require -fPIC.
require -fPIC on arm64 in addition to x86_64 and arm
With gcc-8, a-c-c now fails to build its test cases with a relocation error
on arm64.  Add arm64 to the list of archs where we require -fPIC.

lvc/abi-compliance-checker,lvc/abi-compliance-checker,lvc/abi-compliance-checker