Compilation error on Fuzzie

[robe]

Step #5: Digest: sha256:3c0510dd5fe86fe53ec81e25b4d433f8545bb94fe795df0ec20d058e37bd63c3
Step #5: Status: Downloaded newer image for gcr.io/oss-fuzz-base/base-runner:latest
Step #5: INFO: performing bad build checks for /workspace/out/address/wkb_import_fuzzer.
Step #5: INFO: performing bad build checks for /workspace/out/address/wkt_import_fuzzer.
Step #5: Broken fuzz targets (2):
Step #5: wkb_import_fuzzer:
Step #5: BAD BUILD: /workspace/out/address/wkb_import_fuzzer seems to have either startup crash or exit:
Step #5: /workspace/out/address/wkb_import_fuzzer: /lib/x86_64-linux-gnu/libm.so.6: version `GLIBC_2.29' not found (required by /workspace/out/address/wkb_import_fuzzer)
Step #5: wkt_import_fuzzer:
Step #5: BAD BUILD: /workspace/out/address/wkt_import_fuzzer seems to have either startup crash or exit:
Step #5: /workspace/out/address/wkt_import_fuzzer: /lib/x86_64-linux-gnu/libm.so.6: version `GLIBC_2.29' not found (required by /workspace/out/address/wkt_import_fuzzer)
Step #5: ERROR: 100% of fuzz targets seem to be broken. See the list above for a detailed information.
Finished Step #5
ERROR
ERROR: build step 5 "gcr.io/oss-fuzz-base/base-runner" failed: exit status 1

[komzpa]

To fix this, a change like this is needed, but going from 19.04 to 18.10 Ubuntu Cosmic. 19.04 was recently made incompatible with 16.04 that google runs on.

​https://github.com/google/oss-fuzz/pull/2173/files

[komzpa]

In 17726:

OSS Fuzz for geojson.

Enable allocation testing for other fuzzers.

Closes #4387
Closes ​https://github.com/postgis/postgis/pull/462