Reduce header complexity

- Remove most __ASSEMBLER__ __LINKER__ ifdefs
- Rename libc/intrin/bits.h to libc/serialize.h
- Block pthread cancelation in fchmodat() polyfill
- Remove `clang-format off` statements in third_party

test/libc/stdio/fgetwc_test.c

@@ -16,7 +16,6 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/intrin/bits.h"
 #include "libc/stdio/stdio.h"
 #include "libc/testlib/testlib.h"
 

test/libc/stdio/getdelim_test.c

@@ -17,7 +17,6 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/assert.h"
-#include "libc/intrin/bits.h"
 #include "libc/log/libfatal.internal.h"
 #include "libc/mem/mem.h"
 #include "libc/runtime/symbols.internal.h"

test/libc/stdio/joinstrlist_test.c

@@ -16,7 +16,7 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/intrin/bits.h"
+#include "libc/serialize.h"
 #include "libc/mem/mem.h"
 #include "libc/stdio/append.h"
 #include "libc/stdio/strlist.internal.h"

test/libc/stdio/mt19937_test.c

@@ -17,7 +17,6 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/errno.h"
-#include "libc/intrin/bits.h"
 #include "libc/log/check.h"
 #include "libc/macros.internal.h"
 #include "libc/mem/gc.internal.h"

test/libc/stdio/rand_test.c

@@ -16,9 +16,9 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/intrin/bits.h"
-#include "libc/mem/mem.h"
 #include "libc/stdio/rand.h"
+#include "libc/serialize.h"
+#include "libc/mem/mem.h"
 #include "libc/str/str.h"
 #include "libc/testlib/hyperion.h"
 #include "libc/testlib/testlib.h"

test/libc/stdio/rngset_test.c

@@ -16,7 +16,7 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/intrin/bits.h"
+#include "libc/serialize.h"
 #include "libc/stdio/rand.h"
 #include "libc/testlib/testlib.h"
 

test/libc/stdio/sprintf_s_test.c

@@ -16,7 +16,6 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/intrin/bits.h"
 #include "libc/intrin/safemacros.internal.h"
 #include "libc/mem/gc.h"
 #include "libc/testlib/testlib.h"

test/libc/stdio/sscanf_test.c

@@ -17,7 +17,6 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/errno.h"
-#include "libc/intrin/bits.h"
 #include "libc/inttypes.h"
 #include "libc/limits.h"
 #include "libc/math.h"

test/libc/stdio/vappendf_test.c

@@ -16,7 +16,7 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/intrin/bits.h"
+#include "libc/serialize.h"
 #include "libc/mem/mem.h"
 #include "libc/stdio/append.h"
 #include "libc/str/str.h"