Lagom: Build with -fno-no-semantic-interposition

Lagom: Build with -fno-no-semantic-interposition

We build with this in non-lagom builds, and serenity's gcc even adds it
to its CC1_SPEC. Let's use it for lagom too.

Reduces the number of dynamic relocations in liblagom-js.so.0.0.0 (per
`objdump -R`) from 15133 to 14534, and increases its size back to 91M
(95156800 bytes), probably due to more inlining being possible.
This might help perf of lagom binaries.

Meta/Lagom/CMakeLists.txt

@@ -68,6 +68,7 @@ add_compile_options(-Wall -Wextra -Werror)
 add_compile_options(-fPIC -g)
 add_compile_options(-Wno-maybe-uninitialized)
 add_compile_options(-fno-exceptions)
+add_compile_options(-fno-semantic-interposition)
 
 set(CMAKE_CXX_STANDARD 20)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)