Use compiler flag -gdwarf-5 as per BinSkim (#101)

Author: adityapatwardhan

src/libpsl-native/CMakeLists.txt

@@ -3,7 +3,7 @@ project(PSL-NATIVE)
 
 # Can't use add_compile_options with 2.8.11
 set(CMAKE_BUILD_TYPE "Release")
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -Wall -Werror -fstack-protector-strong -fpie -D_FORTIFY_SOURCE=2")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -Wall -Werror -fstack-protector-strong -fpie -D_FORTIFY_SOURCE=2 -gdwarf-5")
 
 if (${CMAKE_SYSTEM_NAME} MATCHES "Linux" OR "FreeBSD")
     set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -Wl,-z,relro,-z,now")