Bump epics-base to 7.0.4.1

[beenje]

Checklist

• [X] Used a personal fork of the feedstock to propose changes
• [X] Reset the build number to 0 (if the version changed)
• [ ] Re-rendered with the latest conda-smithy (Use the phrase code>@<space/conda-forge-admin, please rerender in a comment in this PR for automated rerendering)
• [X] Ensured the license file is being packaged.

[conda-forge-linter]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe) and found it was in an excellent condition.

I do have some suggestions for making it better though...

For recipe:

• License is not an SPDX identifier (or a custom LicenseRef) nor an SPDX license expression.

Documentation on acceptable licenses can be found here.

[beenje]

@conda-forge-admin please rerender

[beenje]

Linux build failed due to perl modules:

Installing PERL_MODULES file $PREFIX/epics/lib/perl/CA.pm
$BUILD_PREFIX/bin/x86_64-conda_cos6-linux-gnu-gcc  -D_GNU_SOURCE -D_DEFAULT_SOURCE          -D_X86_64_ -DUNIX  -Dlinux      -O3   -Wall   -D_REENTRANT -D_GNU_SOURCE --sysroot=$BUILD_PREFIX/bin/..//x86_64-conda_cos6-linux-gnu/sysroot -fwrapv -fno-strict-aliasing -pipe -fstack-protector-strong -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -D_FORTIFY_SOURCE=2   -mtune=generic     -m64 -fPIC -I. -I../O.Common -I. -I. -I.. -I$PREFIX/epics/include/compiler/gcc -I$PREFIX/epics/include/os/Linux -I$PREFIX/epics/include    -I$BUILD_PREFIX/lib/5.26.2/x86_64-linux-thread-multi/CORE   -I$PREFIX/include  -c Cap5.c
In file included from ../Cap5.xs:16:0:
/home/conda/feedstock_root/build_artifacts/epics-base_1598449322702/_build_env/lib/5.26.2/x86_64-linux-thread-multi/CORE/perl.h:694:10: fatal error: sys/types.h: No such file or directory
 #include <sys/types.h>
          ^~~~~~~~~~~~~
compilation terminated.

[beenje]

Superseded by https://github.com/conda-forge/epics-base-feedstock/pull/14