-Werror (#1567)

* werror

* -Wno-inconsistent-missing-override

* Silence ffmpeg deprecation warnings

* add some more pragmas to ignore warnings

Co-authored-by: Comma Device <device@comma.ai>
old-commit-hash: 50f3f1d3357b356c5b1144c518f35375f5bb9924

SConstruct

@@ -106,11 +106,9 @@ env = Environment(
     "-g",
     "-fPIC",
     "-O2",
-    "-Werror=implicit-function-declaration",
-    "-Werror=incompatible-pointer-types",
-    "-Werror=int-conversion",
-    "-Werror=return-type",
-    "-Werror=format-extra-args",
+    "-Werror",
+    "-Wno-deprecated-register",
+    "-Wno-inconsistent-missing-override",
   ] + cflags + ccflags_asan,
 
   CPPPATH=cpppath + [