Revert "Make ClassLinker::DumpForSigQuit exclude gc"

This reverts commit 825e82972fe46fdb0419c42bd7df102df1989ff9.

Reason for revert: Not clear it fixed anything. See b/195261575 .

Bug: 195261575
Test: TreeHugger
Change-Id: I6fd0d10b5134037d2df399abbbaa3302454f0e4f
Merged-In: I6fd0d10b5134037d2df399abbbaa3302454f0e4f
(cherry picked from commit fb3ad7201bf2d9154862e347e960df376ac04c3c)