baremetal: all examples working, all failures accounted for!

SIMD&FP is now enabled in arm from bootloader.

userland/cpp/empty.cpp

@@ -0,0 +1,4 @@
+// Sanity checking low level stuff, initially inspired by baremetal.
+// https://github.com/cirosantilli/linux-kernel-module-cheat#baremetal-cpp
+
+int main() {}