[poppler] : Add poppler-data support for Poppler fuzzers

[ADITYATIWARI342005]

Installs poppler-data package and copies encoding files to $OUT/poppler-data for runtime access.

Why: Poppler's GlobalParams requires CMap and encoding data for CJK text and character mapping operations. Currently unavailable in OSS-Fuzz environment.

Changes:

• Dockerfile: Install poppler-data package
• build.sh: Copy /usr/share/poppler to $OUT/poppler-data

Coordination:

• Poppler MR: https://gitlab.freedesktop.org/poppler/poppler/-/merge_requests/2008
• Issue: https://gitlab.freedesktop.org/poppler/poppler/-/issues/1656

cc: @tsdgeos

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[github-actions]

ADITYATIWARI342005 is a new contributor to projects/poppler. The PR must be approved by known contributors before it can be merged. The past contributors are: tsdgeos, maflcko, vanhauser-thc

[tsdgeos]

Please use make install as described by poppler data readme

[ADITYATIWARI342005]

Hi @tsdgeos
I have made the changes as per your instructions, please review it.

[ADITYATIWARI342005]

Hi @tsdgeos
Ready for review.

please do not add useless comments. we do not need a comment saying that make install does install.

Removed. the file had similar comments, so I mentioned it to follow the practice.

[tsdgeos]

@DavidKorczynski please merge :)

[ADITYATIWARI342005]

Hi @tsdgeos
I was testing its integration with the poppler MR, and I encountered that the Makefile's install target attempted to install poppler-data.pc to $(datadir)/pkgconfig (defaults to /usr/local/share/pkgconfig), which failed with permission denied in the OSS-Fuzz build environment, causing make to exit before installing the cMap directory.

so I changed it to make install pkgdatadir=$OUT/poppler-data datadir=$OUT/tmp-datadir, & I have verified the build and integration to be functional on this new configuration.

[tsdgeos]

Looks good.

@DavidKorczynski please merge

@ADITYATIWARI342005 there's no need to keep merging master to this branch