community/binutils-cross-embedded: Fix AVR

- This drops a fix needed to work with community/gcc-avr
- It creates empty include folders in /usr/$target/include for each cross
  compilation target
    - This fixes compilation of testing/gcc-cross-embedded with AVR enabled
      (for some reason the compilation checks for existence of the include
       folder, even though no files are ever included.)
7 jobs for !13612 with binutils in 15 minutes and 23 seconds
latest detached
Status Job ID Name Coverage
  Lint
passed #318548
docker-alpine x86_64
lint

00:00:18

 
  Build
passed #318553
docker-alpine ci-build aarch64
build-aarch64

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passed #318554
docker-alpine ci-build armv7
build-armv7

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passed #318552
docker-alpine ci-build ppc64le
build-ppc64le

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passed #318551
docker-alpine ci-build s390x
build-s390x

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passed #318550
docker-alpine ci-build x86
build-x86

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passed #318549
docker-alpine ci-build x86_64
build-x86_64

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