Move about a dozen test files for blob, blob-ext, blob-ext-list,
fake-blob, and blob-symbol entries into a blob/ subdirectory. Drop
the numeric prefixes and the redundant blob_ filename prefix, and
update all references.

Signed-off-by: Simon Glass <simon.glass@canonical.com>
Reviewed-by: Quentin Schulz <quentin.schulz@cherry.de>

It is useful to be able to distinguish between ordinary blobs such as
u-boot.bin and external blobs that cannot be build by the U-Boot build
system. If the external blobs are not available for some reason, then we
know that a value image cannot be built.

Introduce a new 'blob-ext' entry type for that.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

This reverts commit 5d3a21df6694ebd66d5c34c9d62a26edc7456fc7, reversing
changes made to 56d37f1c564107e27d873181d838571b7d7860e7.

Unfortunately this is causing CI failures:
https://travis-ci.org/github/trini/u-boot/jobs/711313649

Signed-off-by: Tom Rini <trini@konsulko.com>

It is useful to be able to distinguish between ordinary blobs such as
u-boot.bin and external blobs that cannot be build by the U-Boot build
system. If the external blobs are not available for some reason, then we
know that a value image cannot be built.

Introduce a new 'blob-ext' entry type for that.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>