[pgo] Do not explicitly link profile runtime

Bug: http://b/181740505

Explicitly adding dependency to profile runtime causes apex dependency
errors.  We're already passing -fprofile-instr-generate to the linker so
depending on the profile runtimes is unnecessary.

Test: pgo-coral-config1 on internal release branch and run tests on
      APCT.
Change-Id: Ie54785726c7ac044e5a5a2299073d02d45d5e0a7