Make aarch64-linux-gnu-gcc work again on armv7h
Before we had an aarch64-linux-gnu-gcc package on armv7h, but it was removed accidentally.
And if we build the PKGBUILD it fails, so we need to fix the build and to upload a new package.
Updated by bill-auger about 1 month ago
most of the cross-compiler toolchain packages are in armv7h/libre-testing now - 'aarch64-linux-gnu-gcc' was the only problematic package
aarch64-linux-gnu-gcc-initial 9.3.0-1parabola1 aarch64-linux-gnu-binutils 2.38-1 aarch64-linux-gnu-glibc 2.35-1 aarch64-linux-gnu-linux-libre-api-headers 5.18_gnu-1
we were able to package linux-libre-64 for armv7h, by cross-compiling from x86_64, either with `export CARCH=armv7h ; makepkg -s ;` or by putting "CARCH=armv7h" in the PKGBUILD - its not a great general solution, but that is perhaps a good path to bootstrapping 'aarch64-linux-gnu-gcc' for armv7h