Port a lot more code to AARCH64

- Introduce epoll_pwait()
- Rewrite -ftrapv and ffs() libraries in C code
- Use more FreeBSD code in math function library
- Get significantly more tests passing on qemu-aarch64
- Fix many Musl long double functions that were broken on AARCH64

third_party/python/Include/yoink.h

@@ -1,10 +1,19 @@
 #ifndef COSMOPOLITAN_THIRD_PARTY_PYTHON_INCLUDE_YOINK_H_
 #define COSMOPOLITAN_THIRD_PARTY_PYTHON_INCLUDE_YOINK_H_
 
+#ifdef __x86_64__
 #define PYTHON_YOINK(s)             \
   __asm__(".section .yoink\n\t"     \
           "nopl\t\"pyc:" s "\"\n\t" \
           ".previous")
+#elif defined(__aarch64__)
+#define PYTHON_YOINK(s)           \
+  __asm__(".section .yoink\n\t"   \
+          "bl\t\"pyc:" s "\"\n\t" \
+          ".previous")
+#else
+#error "architecture unsupported"
+#endif /* __x86_64__ */
 
 #define PYTHON_PROVIDE(s)             \
   __asm__(".section .yoink\n"         \