Revert "Revert "use cfX toolchain 4.8""

This reverts commit 12b4c88c7da8847c11906d0008d5570d863cf33e.
Revert "Revert "Use prebuilts in manifest, rather than wgetting dailies""

This reverts commit 4bcdf310627a4f33ff90fd804700e33e4a19c0ee.
Revert "Revert "Fix build w/ gcc 4.8""

This reverts commit ad36801587a857ea84b2324db650b8476fd7730a.
Revert "Revert "build rom with cfxtoolchain-4.8 (part3)""

This reverts commit 42a1be4a1a6acb9c9d2bf7f3b1d20bccc9d0817f.
Revert "Revert "Clean ccache in preparation for gcc48 building""

This reverts commit f0095aea5e32f9517788af3d31c5f8b743262184.
Revert "Revert "enable new dtags""

This reverts commit 2b2a676d6cf3f11f5fce6300551b6c36116890f5.