Update to latest BearSSL library version, fixes esp8266#4898 (esp8266…

…#4900)

* Update to latest BearSSL library version, fixes esp8266#4898

* Actually install the updated BearSSL lib/headers

tools/sdk/include/bearssl/bearssl_aead.h

@@ -877,7 +877,7 @@ extern const br_aead_class br_eax_vtable;
  *     can still be provided by chunks, but the total size must match
  *     the value provided upon initialisation.
  *
- *   - The nonce length is constrained betwen 7 and 13 bytes (inclusive).
+ *   - The nonce length is constrained between 7 and 13 bytes (inclusive).
  *     Furthermore, the plaintext length, when encoded, must fit over
  *     15-nonceLen bytes; thus, if the nonce has length 13 bytes, then
  *     the plaintext length cannot exceed 65535 bytes.

tools/sdk/include/bearssl/bearssl_git.h

@@ -1,2 +1,2 @@
 // Do not edit -- Automatically generated by tools/sdk/ssl/bearssl/Makefile
-#define BEARSSL_GIT 94e9704
+#define BEARSSL_GIT 6d1cefc

tools/sdk/include/bearssl/bearssl_hash.h

@@ -93,7 +93,7 @@ extern "C" {
  *   - `br_xxx_out(const br_xxx_context *ctx, void *out)`
  *
  *     Complete the hash computation and write the result in the provided
- *     buffer. The output buffer MUST be large enough to accomodate the
+ *     buffer. The output buffer MUST be large enough to accommodate the
  *     result. The context is NOT modified by this operation, so this
  *     function can be used to get a "partial hash" while still keeping
  *     the possibility of adding more bytes to the input.

tools/sdk/include/bearssl/bearssl_hmac.h

@@ -155,7 +155,7 @@ void br_hmac_update(br_hmac_context *ctx, const void *data, size_t len);
 /**
  * \brief Compute the HMAC output.
  *
- * The destination buffer MUST be large enough to accomodate the result;
+ * The destination buffer MUST be large enough to accommodate the result;
  * its length is at most the "natural length" of HMAC (i.e. the output
  * length of the underlying hash function). The context is NOT modified;
  * further bytes may be processed. Thus, "partial HMAC" values can be

tools/sdk/include/bearssl/bearssl_prf.h

@@ -37,7 +37,7 @@ extern "C" {
  * # The TLS PRF
  *
  * The "PRF" is the pseudorandom function used internally during the
- * SSL/TLS handshake, notably to expand negociated shared secrets into
+ * SSL/TLS handshake, notably to expand negotiated shared secrets into
  * the symmetric encryption keys that will be used to process the
  * application data.
  *

tools/sdk/include/bearssl/bearssl_rand.h

@@ -279,7 +279,7 @@ typedef int (*br_prng_seeder)(const br_prng_class **ctx);
  * is returned.
  *
  * If `name` is not `NULL`, then `*name` is set to a symbolic string
- * that identifies the seeder implemention. If no seeder is returned
+ * that identifies the seeder implementation. If no seeder is returned
  * and `name` is not `NULL`, then `*name` is set to a pointer to the
  * constant string `"none"`.
  *