ensures usr/lib exists for target of the usr/lib64 symlink

[joshrwolf]

this materialized as a rather cryptic file exists error in melange when trying to build the world.

relevant logs:

/Library/Developer/CommandLineTools/usr/bin/make yamlfile=pkgconf.yaml pkgname=pkgconf packages/aarch64/pkgconf-1.9.5-r0.apk

...

ca-certificates-bundle (20230506-r0) /Users/wolf/dev/gh/wolfi/os/packages/aarch64/ca-certificates-bundle-20230506-r0.apk
wolfi-baselayout (20230201-r3) /Users/wolf/dev/gh/wolfi/os/packages/aarch64/wolfi-baselayout-20230201-r3.apk
ld-linux (2.37-r7) /Users/wolf/dev/gh/wolfi/os/packages/aarch64/ld-linux-2.37-r7.apk
linux-headers (5.16.9-r1) https://packages.wolfi.dev/bootstrap/stage3/aarch64/linux-headers-5.16.9-r1.apk
glibc (2.36-r0) https://packages.wolfi.dev/bootstrap/stage3/aarch64/glibc-2.36-r0.apk
libgcc (13.1.0-r1) /Users/wolf/dev/gh/wolfi/os/packages/aarch64/libgcc-13.1.0-r1.apk
libstdc++ (13.1.0-r1) /Users/wolf/dev/gh/wolfi/os/packages/aarch64/libstdc++-13.1.0-r1.apk
binutils (2.40-r3) /Users/wolf/dev/gh/wolfi/os/packages/aarch64/binutils-2.40-r3.apk
libstdc++-dev (13.1.0-r1) /Users/wolf/dev/gh/wolfi/os/packages/aarch64/libstdc++-dev-13.1.0-r1.apk
libatomic (13.1.0-r1) /Users/wolf/dev/gh/wolfi/os/packages/aarch64/libatomic-13.1.0-r1.apk
gmp (6.2.1-r7) /Users/wolf/dev/gh/wolfi/os/packages/aarch64/gmp-6.2.1-r7.apk
libgomp (13.1.0-r1) /Users/wolf/dev/gh/wolfi/os/packages/aarch64/libgomp-13.1.0-r1.apk
isl (0.26-r0) /Users/wolf/dev/gh/wolfi/os/packages/aarch64/isl-0.26-r0.apk
mpfr (4.2.0-r3) /Users/wolf/dev/gh/wolfi/os/packages/aarch64/mpfr-4.2.0-r3.apk
mpc (1.3.1-r0) /Users/wolf/dev/gh/wolfi/os/packages/aarch64/mpc-1.3.1-r0.apk
zlib (1.2.13-r3) /Users/wolf/dev/gh/wolfi/os/packages/aarch64/zlib-1.2.13-r3.apk
gcc (13.1.0-r1) /Users/wolf/dev/gh/wolfi/os/packages/aarch64/gcc-13.1.0-r1.apk
glibc-dev (2.37-r7) /Users/wolf/dev/gh/wolfi/os/packages/aarch64/glibc-dev-2.37-r7.apk
make (4.3-r3) /Users/wolf/dev/gh/wolfi/os/packages/aarch64/make-4.3-r3.apk
pkgconf (1.9.3-r1) https://packages.wolfi.dev/bootstrap/stage3/aarch64/pkgconf-1.9.3-r1.apk
build-base (1-r5) /Users/wolf/dev/gh/wolfi/os/packages/aarch64/build-base-1-r5.apk
busybox (1.36.1-r2) /Users/wolf/dev/gh/wolfi/os/packages/aarch64/busybox-1.36.1-r2.apk
scanelf (1.3.4-r1) https://packages.wolfi.dev/bootstrap/stage3/aarch64/scanelf-1.3.4-r1.apk
openssl-config (3.1.1-r1) /Users/wolf/dev/gh/wolfi/os/packages/aarch64/openssl-config-3.1.1-r1.apk
libcrypto3 (3.1.1-r1) /Users/wolf/dev/gh/wolfi/os/packages/aarch64/libcrypto3-3.1.1-r1.apk
libssl3 (3.1.1-r1) /Users/wolf/dev/gh/wolfi/os/packages/aarch64/libssl3-3.1.1-r1.apk
wget (1.21.4-r0) /Users/wolf/dev/gh/wolfi/os/packages/aarch64/wget-1.21.4-r0.apk

...

❕ aarch64   | installing libgcc (13.1.0-r1)

...

❕ aarch64   | buildImage failed: installing apk packages: unable to install files for pkg libgcc: error creating directory usr/lib64: mkdir /var/folders/5v/6gvb9x954sbd9tmqq14cwgrh0000gn/T/melange-guest-972405094/usr/lib64: file exists

I think this is otherwise benign, as it just adds an empty directory to ensure the already existing symlink usr/lib64 -> usr/lib is resolvable so that writes to usr/lib64/* don't bomb out

part of #3580

[kaniini]

epoch needs to be bumped so it actually gets rebuilt

[joshrwolf]

epoch needs to be bumped so it actually gets rebuilt

🤦 good catch thanks, updated