Remove tests against hidden libwebp symbols in link_webp_test1.cc

[valgur]

link_webp_test1.cc currently tests linking against a few internal-only symbols of the webp library. This sort of works with a static webp, but fails for a shared version.

Here's what objdump shows for these symbols in the latest version of libwebp.

Static:

objdump -t ~/.conan2/p/libwe0ab986b34fa07/p/lib/*.a | grep -P 'WebPGetDemuxVersion|WebPGetMuxVersion|WebPAllocateDecBuffer|WebPFreeDecBuffer|VP8LNew|VP8LClear' | grep -v '*UND*' | sort -u
0000000000000000 g     F .text	0000000000000006 WebPGetMuxVersion
00000000000000f0 g     F .text	0000000000000428 .hidden WebPAllocateDecBuffer
0000000000000570 g     F .text	000000000000003b WebPFreeDecBuffer
0000000000000a40 g     F .text	0000000000000031 .hidden VP8LClearBackwardRefs
0000000000000bb0 g     F .text	0000000000000006 WebPGetDemuxVersion
0000000000002860 g     F .text	000000000000002f .hidden VP8LNew
0000000000002890 g     F .text	0000000000000101 .hidden VP8LClear

Shared:

objdump -T ~/.conan2/p/libwed5d42768c6b93/p/lib/*.so | grep -P 'WebPGetDemuxVersion|WebPGetMuxVersion|WebPAllocateDecBuffer|WebPFreeDecBuffer|VP8LNew|VP8LClear' | LC_COLLATE=C sort -u
0000000000002780 g    DF .text	0000000000000006  Base        WebPGetDemuxVersion
0000000000002da0 g    DF .text	000000000000003b  Base        WebPFreeDecBuffer
0000000000003f10 g    DF .text	000000000000003b  Base        WebPFreeDecBuffer
00000000000064a0 g    DF .text	0000000000000006  Base        WebPGetMuxVersion

For context, this cropped up in a PR for adding a TileDB recipe to the Conan Center Index: conan-io/conan-center-index#19381

---

TYPE: BUG
DESC: Fix broken linking tests against a shared WebP library

[teo-tsirpanis]

this cropped up in a PR for adding a TileDB recipe to the Conan Center Index

Curious how it appeared. The Conan PR seems to disable tests and link_webp_test1.cc should not have been compiled.

[valgur]

this cropped up in a PR for adding a TileDB recipe to the Conan Center Index

Curious how it appeared. The Conan PR seems to disable tests and link_webp_test1.cc should not have been compiled.

@teo-tsirpanis This test does not appear to be hidden behind any CMake variables and CMakeLists.txt always applies enable_testing(). Probably should make enable_testing() contional on TILEDB_TESTS.

[teo-tsirpanis]

Hmm, the sources for the test are defined in tiledb/sm/compressors/test but the CMake target is in tiledb/sm/compressors. The add_test_subdirectory command takes care of not including the test subdirectories if tests are not enabled. Will take care of it, thanks for noticing!

[teo-tsirpanis]

LGTM if CI succeeds. Thanks for the contribution!