Clean up more code

- Found some bugs in LLVM compiler-rt library
- The useless LIBC_STUBS package is now deleted
- Improve the overflow checking story even further
- Get chibicc tests working in MODE=dbg mode again
- The libc/isystem/ headers now have correctly named guards

examples/examples.mk

@@ -59,7 +59,6 @@ EXAMPLES_DIRECTDEPS =								\
 	LIBC_SOCK								\
 	LIBC_STDIO								\
 	LIBC_STR								\
-	LIBC_STUBS								\
 	LIBC_SYSV								\
 	LIBC_SYSV_CALLS								\
 	LIBC_TESTLIB								\
@@ -77,10 +76,10 @@ EXAMPLES_DIRECTDEPS =								\
 	THIRD_PARTY_DOUBLECONVERSION						\
 	THIRD_PARTY_GDTOA							\
 	THIRD_PARTY_GETOPT							\
+	THIRD_PARTY_HIREDIS							\
 	THIRD_PARTY_LIBCXX							\
 	THIRD_PARTY_LINENOISE							\
 	THIRD_PARTY_LUA								\
-	THIRD_PARTY_HIREDIS							\
 	THIRD_PARTY_MBEDTLS							\
 	THIRD_PARTY_MUSL							\
 	THIRD_PARTY_NSYNC							\