Patch by @dpino
Fixes the following error on Ubuntu 18:
```
[716/8153] Linking CXX shared library lib/libmbmalloc.so
FAILED: lib/libmbmalloc.so
: && <CXX> -fPIC -fdiagnostics-color=always -Wextra -Wall -pipe -Wno-odr -Wno-stringop-overflow -Wno-nonnull -Wno-array-bounds -Wno-expansion-to-defined -Wno-noexcept-type -Wno-psabi -Wno-misleading-indentation -Wno-maybe-uninitialized -Wwrite-strings -Wundef -Wpointer-ari>
/usr/bin/ld: Source/bmalloc/CMakeFiles/bmalloc.dir/libpas/src/libpas/pas_deallocate.c.o: relocation R_X86_64_PC32 against symbol `pas_segregated_page_deallocation_did_fail' can not be used when making a shared object; recompile with -fPIC
/usr/bin/ld: final link failed: Bad value
```
Pretty-diff:
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|---|---|---|
| .. | ||
| embedder/Playwright | ||
| patches | ||
| .gitignore | ||
| archive.sh | ||
| build.sh | ||
| BUILD_NUMBER | ||
| buildwin.bat | ||
| clean.sh | ||
| concat_protocol.js | ||
| EXPECTED_BUILDS | ||
| pw_run.sh | ||
| pw_run_debug.sh | ||
| UPSTREAM_CONFIG.sh | ||
| upstream_status.md | ||