Disable Asan in LDPC decoder generator executables

The CI compiles the physims using Asan. This in turn compiles Asan into
the LDPC decoder generator files. Since they are run during build, there
are two options:

1) trigger the build using capability SYS_PTRACE to allow running asan
   when executing the generators.
2) disable asan in the generators.

The first option seems not feasible, as the compilation of the ldpctest
does not succeed (in fact, for a reason I don't understand, ninja seems
to trigger linking and is then blocked indefinitely). Therefore, this
commit simple disables asan in the generators.

openair1/PHY/CODING/nrLDPC_decoder/nrLDPC_tools/generator_bnProc/main.c

@@ -27,6 +27,12 @@ void nrLDPC_bnProc_BG2_generator_AVX2(const char*, int);
 void nrLDPC_bnProcPc_BG1_generator_AVX2(const char*, int);
 void nrLDPC_bnProcPc_BG2_generator_AVX2(const char*, int);
 
+const char *__asan_default_options()
+{
+  /* don't do leak checking in nr_ulsim, creates problems in the CI */
+  return "detect_leaks=0";
+}
+
 int main(int argc, char *argv[])
 {
   if (argc != 2) {

openair1/PHY/CODING/nrLDPC_decoder/nrLDPC_tools/generator_bnProc_avx512/main.c

@@ -28,6 +28,12 @@ void nrLDPC_bnProc_BG2_generator_AVX512(const char *, int);
 void nrLDPC_bnProcPc_BG1_generator_AVX512(const char *, int);
 void nrLDPC_bnProcPc_BG2_generator_AVX512(const char *, int);
 
+const char *__asan_default_options()
+{
+  /* don't do leak checking in nr_ulsim, creates problems in the CI */
+  return "detect_leaks=0";
+}
+
 int main(int argc, char *argv[])
 {
   if (argc != 2) {

openair1/PHY/CODING/nrLDPC_decoder/nrLDPC_tools/generator_cnProc/main.c

@@ -24,6 +24,13 @@
 #define NB_R  3
 void nrLDPC_cnProc_BG1_generator_AVX2(const char*, int);
 void nrLDPC_cnProc_BG2_generator_AVX2(const char*, int);
+
+const char *__asan_default_options()
+{
+  /* don't do leak checking in nr_ulsim, creates problems in the CI */
+  return "detect_leaks=0";
+}
+
 int main(int argc, char *argv[])
 {
   if (argc != 2) {

openair1/PHY/CODING/nrLDPC_decoder/nrLDPC_tools/generator_cnProc_avx512/main.c

@@ -24,6 +24,13 @@
 #define NB_R  3
 void nrLDPC_cnProc_BG1_generator_AVX512(const char *, int);
 void nrLDPC_cnProc_BG2_generator_AVX512(const char *, int);
+
+const char *__asan_default_options()
+{
+  /* don't do leak checking in nr_ulsim, creates problems in the CI */
+  return "detect_leaks=0";
+}
+
 int main(int argc, char *argv[])
 {
   if (argc != 2) {