crossgcc: Update to clang 4.0

Drop Edward's cfe patch because it has been implemented by
upstream clang differently. Instead of

 $ clang --print-librt-file-name

the right way to get ahold of the compiler-rt builtin library is

 $ clang -rtlib=compiler-rt --print-libgcc-file-name

Change-Id: I8aac5256da5bfb6f7bebeff0959f16b53867c581
Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-on: https://review.coreboot.org/20274
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

util/crossgcc/sum/cfe-3.9.1.src.tar.xz.cksum

@@ -1 +0,0 @@
-95e4be54b70f32cf98a8de36821ea5495b84add8  tarballs/cfe-3.9.1.src.tar.xz

util/crossgcc/sum/cfe-4.0.0.src.tar.xz.cksum

@@ -0,0 +1 @@
+e2762800c93d9335781ea6a45af3f80845542ef5  tarballs/cfe-4.0.0.src.tar.xz

util/crossgcc/sum/clang-tools-extra-3.9.1.src.tar.xz.cksum

@@ -1 +0,0 @@
-f24e5ceb226a72e781cefde4e30f2d7be09ea305  tarballs/clang-tools-extra-3.9.1.src.tar.xz

util/crossgcc/sum/clang-tools-extra-4.0.0.src.tar.xz.cksum

@@ -0,0 +1 @@
+bdb543c4bb87bd80fe65711114ca0a5c25329ae3  tarballs/clang-tools-extra-4.0.0.src.tar.xz

util/crossgcc/sum/compiler-rt-3.9.1.src.tar.xz.cksum

@@ -1 +0,0 @@
-938921d076e28943f5d5b653514f2ce36a88a55e  tarballs/compiler-rt-3.9.1.src.tar.xz

util/crossgcc/sum/compiler-rt-4.0.0.src.tar.xz.cksum

@@ -0,0 +1 @@
+a879b610e427ef3bba482bdc031ae371cabab81e  tarballs/compiler-rt-4.0.0.src.tar.xz

util/crossgcc/sum/llvm-3.9.1.src.tar.xz.cksum

@@ -1 +0,0 @@
-ce801cf456b8dacd565ce8df8288b4d90e7317ff  tarballs/llvm-3.9.1.src.tar.xz

util/crossgcc/sum/llvm-4.0.0.src.tar.xz.cksum

@@ -0,0 +1 @@
+aee4524e2407f9fe5afc6f70c753180b907011d0  tarballs/llvm-4.0.0.src.tar.xz