community/openjdk7: build failure due to bad CRC

openjdk7 currently fails to build. It's not completely clear why it fails, but most likely due to:

INFO: ZIP_DEBUGINFO_FILES=1
expr: syntax error: expecting ')' instead of '4'
# Java sources to be compiled: (listed in file /home/buildozer/aports/community/openjdk7/src/icedtea-2.6.28/openjdk.build-boot/tmp/sun/sun.font/fontmanager/.classes.list)
../../../src/share/classes/sun/font/FreetypeFontScaler.java

See:

• https://build.alpinelinux.org/buildlogs/build-3-16-x86_64/community/openjdk7/openjdk7-7.321.2.6.28-r0.log
• https://build.alpinelinux.org/buildlogs/build-3-16-aarch64/community/openjdk7/openjdk7-7.321.2.6.28-r0.log
• https://build.alpinelinux.org/buildlogs/build-3-16-s390x/community/openjdk7/openjdk7-7.321.2.6.28-r0.log