Remove target_arch = "le32" only cfg selectors.
Bump src/jemalloc.
Only link libc++ && libpnaclmm when targeting PNaCl.
Don't doubly define unwinder_private_data_size for NaCl targets.
Use proper data layouts for (P)NaCl targets.
Bump src/jemalloc.
Correct PTHREAD_STACK_MIN cfg attributes for NaCl targets.
Always impl no-op record_sp_limit for NaCl targets.
Always select a random number to use as a pid for temp dirs.
Don't disable libc::funcs::posix88::mman when targeting NaCl, only disable when Newlib is used.
Signal io impl for GLibc NaCl targets.
Fix a test helper.