test(avplayer): link guest_avplayer with the shared runtime libraries

guest_avplayer_tests imports __cxa_throw from libc.prx, which is loaded
before libstdc++, but -static-libgcc gave it a private copy of
_Unwind_Resume. A failed Check threw through libc.prx's unwinder and the
landing pad of the test function resumed with the private one, so on
Linux every failure aborted in _Unwind_RaiseException_Phase2 instead of
printing its message from main. This is the unexplained Linux abort in
the intermittent guest_avplayer failures.

The test is now linked without the static runtime flags, as the AgcDriver,
Agc and VideoOut tests already are, so the unwinder comes from the same
library as __cxa_throw. A forced Check failure in TestPlayback aborted
before and now prints its message and exits with 1.

(cherry picked from commit fa5199cd8fef7f9c7ab9e83a441e15d16364a81d)

core/libs/prx/libSceAvPlayer/CMakeLists.txt

@@ -2,6 +2,9 @@ include(${CMAKE_CURRENT_SOURCE_DIR}/AvPlayerLibrary.cmake)
 add_sce_avplayer_library(libSceAvPlayer)
 
 if(BUILD_TESTING)
+    foreach(runtimeLinkFlag IN ITEMS -static-libgcc -static-libstdc++ -static)
+        string(REPLACE "${runtimeLinkFlag}" "" CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS}")
+    endforeach()
     add_test_executable(guest_avplayer_tests ${LIBS_INCLUDE_DIR}/tests/GuestAvPlayer.cpp)
     target_include_directories(guest_avplayer_tests PRIVATE ${LIBS_INCLUDE_DIR})
     target_link_libraries(guest_avplayer_tests PRIVATE libSceAvPlayer libc)