Always include the kernel name in the resulting package.

Always include the kernel name in the resulting package.
While functionally expected to be a no-op on big-iron hardware,
embedded hardware (arm, mips) do not have a GENERIC kernel, so
the KERNCONF value must be included in the package to avoid
conflicting packages for the default kernel (RPI-B versus RPI2,
for example).

While here, correct the kernel name in the metadata.

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