Add lsan.supp for opengl leak (fixes ddnet#5296)

See also Jupeyy's explanation in
ddnet#4294 for why we want to ignore
this:

> sadly components have no OnDestruct on anything like that
> so aslong it doesn't actually leak it's just non destructed memory

So it's something we allocate once for the entire client lifetime from
my understanding.

=================================================================
==421461==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 411760 byte(s) in 10 object(s) allocated from:
    #0 0x55eaf0c08a29 in malloc (/media/ddnet/integration_test/DDNet+0x736a29)
    #1 0x55eaf0de9f72 in CCommandProcessorFragment_OpenGL2::Cmd_CreateBufferObject(CCommandBuffer::SCommand_CreateBufferObject const*) /media/ddnet/src/engine/client/backend/opengl/backend_opengl.cpp:1898:25
    #2 0x55eaf0dd82f5 in CCommandProcessorFragment_OpenGL::RunCommand(CCommandBuffer::SCommand const*) /media/ddnet/src/engine/client/backend/opengl/backend_opengl.cpp
    #3 0x55eaf0f73229 in CCommandProcessor_SDL_GL::RunBuffer(CCommandBuffer*) /media/ddnet/src/engine/client/backend_sdl.cpp:246:20
    #4 0x55eaf0f70568 in CGraphicsBackend_Threaded::ThreadFunc(void*) /media/ddnet/src/engine/client/backend_sdl.cpp:75:25
    #5 0x55eaf0d679d7 in thread_run(void*) /media/ddnet/src/base/system.cpp:686:2
    #6 0x7f08b788c54c  (/usr/lib/libc.so.6+0x8c54c)

SUMMARY: AddressSanitizer: 411760 byte(s) leaked in 10 allocation(s).

.github/workflows/clang-sanitizer.yml

@@ -36,6 +36,7 @@ jobs:
         cd san
         export UBSAN_OPTIONS=suppressions=../ubsan.supp:log_path=./SAN:print_stacktrace=1:halt_on_errors=0
         export ASAN_OPTIONS=log_path=./SAN:print_stacktrace=1:check_initialization_order=1:detect_leaks=1:halt_on_errors=0
+        export LSAN_OPTIONS=suppressions=../lsan.supp
         ./DDNet "cl_download_skins 0;quit" || true
         ./DDNet-Server shutdown || true
         if test -n "$(find . -maxdepth 1 -name 'SAN.*' -print -quit)"

README.md

@@ -165,7 +165,7 @@ make
 ```
 and run with:
 ```bash
-UBSAN_OPTIONS=suppressions=./ubsan.supp:log_path=./SAN:print_stacktrace=1:halt_on_errors=0 ASAN_OPTIONS=log_path=./SAN:print_stacktrace=1:check_initialization_order=1:detect_leaks=1:halt_on_errors=0 ./DDNet
+UBSAN_OPTIONS=suppressions=./ubsan.supp:log_path=./SAN:print_stacktrace=1:halt_on_errors=0 ASAN_OPTIONS=log_path=./SAN:print_stacktrace=1:check_initialization_order=1:detect_leaks=1:halt_on_errors=0 LSAN_OPTIONS=suppressions=./lsan.supp ./DDNet
 ```
 
 Check the SAN.\* files afterwards. This finds more problems than memcheck, runs faster, but requires a modern GCC/Clang compiler.

lsan.supp

@@ -0,0 +1 @@
+leak:CCommandProcessorFragment_OpenGL2::Cmd_CreateBufferObject

scripts/integration_test.sh

@@ -124,8 +124,7 @@ fi
 # TODO: check for open ports instead
 port=17822
 
-cp ../ubsan.supp .
-cp ../memcheck.supp .
+cp ../ubsan.supp ../lsan.supp ../memcheck.supp .
 
 if [[ $OSTYPE == 'darwin'* ]]; then
 	DETECT_LEAKS=0
@@ -135,6 +134,7 @@ fi
 
 export UBSAN_OPTIONS=suppressions=./ubsan.supp:log_path=./SAN:print_stacktrace=1:halt_on_errors=0
 export ASAN_OPTIONS=log_path=./SAN:print_stacktrace=1:check_initialization_order=1:detect_leaks=$DETECT_LEAKS:halt_on_errors=0
+export LSAN_OPTIONS=suppressions=./lsan.supp
 
 function print_results() {
 	if [ "$arg_valgrind_memcheck" == "1" ]; then
@@ -153,7 +153,7 @@ function print_results() {
 }
 
 if [ "$arg_valgrind_memcheck" == "1" ]; then
-	tool="valgrind --tool=memcheck --gen-suppressions=all --suppressions=memcheck.supp"
+	tool="valgrind --tool=memcheck --gen-suppressions=all --suppressions=memcheck.supp --track-origins=yes"
 	client_args="cl_menu_map \"\";"
 else
 	tool=""
@@ -242,6 +242,7 @@ say "/mc
 ;cmdlist
 ;saytime"
 EOF
+sleep 1
 echo "[*] test rcon commands"
 tr -d '\n' > client1.fifo << EOF
 rcon say hello from admin;