Revert "Disable relocation_packer and migrate to SHT_RELR sections."

This reverts commit fa00dfda13aaf8132bb6e3ae65e0e2adce9939a0.

Reason for revert: New Build Breakages in git_pi-dev-plus-aosp-without-vendor/aosp_walleye-userdebug and git_pi-dev-plus-aosp/aosp_crosshatch-userdebug

Change-Id: Iec9e695cccc3f206df67f0c01cfd4c2c3023dcec
diff --git a/cc/relocation_packer.go b/cc/relocation_packer.go
index 824b538..5006623 100644
--- a/cc/relocation_packer.go
+++ b/cc/relocation_packer.go
@@ -45,14 +45,7 @@
 }
 
 func (p *relocationPacker) packingInit(ctx BaseModuleContext) {
-	// Disable relocation_packer and migrate to SHT_RELR sections.
-	//
-	// Proposal for adding SHT_RELR sections in generic-abi is at
-	// https://groups.google.com/forum/#!topic/generic-abi/bX460iggiKg
-	//
-	// TODO: Remove relocation_packer and associated build logic.
-	enabled := false
-
+	enabled := true
 	// Relocation packer isn't available on Darwin yet
 	if runtime.GOOS == "darwin" {
 		enabled = false