Add -Bsymbolic link option to avoid symbol interposition (#432)

### Motivation

There is a case that `libpulsar.so` could unexpectedly call functions from other dependencies.

For example, assuming the application depends on two libraries:
- `libpulsar.so`, which includes the symbols from `libcurl.a` 8.4.0
- `libfoo.so`, which includes the symbols from `libcurl.a` 7.82.0

If the link order is `libfoo.so` first, then the libcurl definitions from 7.82.0 will also be used by `libpulsar.so` and then the application might crash due to the incompatibility. This is an issue specifically with Linux ELF format.

### Modifications

Add the `-Wl,-Bsymbolic` link option for GCC.

Author: BewareMyPower

lib/CMakeLists.txt

@@ -90,6 +90,9 @@ if (BUILD_DYNAMIC_LIB)
         target_include_directories(pulsarShared PRIVATE ${dlfcn-win32_INCLUDE_DIRS})
         target_link_options(pulsarShared PRIVATE $<$<CONFIG:DEBUG>:/NODEFAULTLIB:MSVCRT>)
     endif()
+    if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
+        target_link_options(pulsarShared PRIVATE -Wl,-Bsymbolic)
+    endif ()
     check_cxx_symbol_exists(__GLIBCXX__ iostream GLIBCXX)
     if (GLIBCXX)
         target_link_libraries(pulsarShared PUBLIC -static-libgcc -static-libstdc++)