* Adds implementations of __{atomic,sync}_nand_fetch_n. These builtins
were implemented for other operations but were not defined for NAND.
* Adds implementation of __atomic_OP_fetch_n for all OPs.
* Adds implementation of __sync_OP_and_fetch_n for all OPs.
Reported in https://github.com/espressif/arduino-esp32/issues/5948
* CI errors led me to believe these were needed, but as it turns out the
load/store intrinsics are required even when idf is built by gcc when
linking to a clang based project.
* remove ... postfix inside `SYNC_LOCK_TEST_AND_SET` expansion
Provide emulated atomic load & store libcalls for u8, u16 & u32 integer
types. This is required when building with Clang as llvm does not lower
these operations to native load / stores, where as gcc does.
Provide `sync_lock_test_and_set` atomic implementations for all
supported integer types.
Closes https://github.com/espressif/esp-idf/issues/7591.
Closes https://github.com/espressif/esp-idf/issues/7592.
