Revert "enable new dtags"

This reverts commit 44a159688e69384741dd0a653463e4b3850e4a7f.
Revert "Clean ccache in preparation for gcc48 building"

This reverts commit ef39b63eb24f3ab898e2ad1a377ac02812d9c5be.
Revert "build rom with cfxtoolchain-4.8 (part3)"

This reverts commit ccf2115a692b9b011bee59bb4b9a383fde852761.
Revert "Fix build w/ gcc 4.8"

This reverts commit e9c3915c32efd178e4dcd2e84a10fd0303e15019.
Revert "Use prebuilts in manifest, rather than wgetting dailies"

This reverts commit 09db42ae9c3ff87d4aa83d94a3e99c78d8752132.
Revert "use cfX toolchain 4.8"

This reverts commit d6c2db2833fd81e8f4b048bc9da76b6e491e0346.