Address comments from aosp/1588677

Test: atest CtsKeystoreTestCases
Change-Id: I8b00c59bd68ae9c7bde7ae8154020301c5e839ae
diff --git a/keystore2/src/crypto/crypto.hpp b/keystore2/src/crypto/crypto.hpp
index 1b8971f..6686c8c 100644
--- a/keystore2/src/crypto/crypto.hpp
+++ b/keystore2/src/crypto/crypto.hpp
@@ -67,7 +67,7 @@
 // cert_len, extract the subject, DER-encode it and write the result to
 // subject_buf, which has subject_buf_len capacity.
 //
-// Because the length of the issuer is unknown, and becaue we'd like to (a) be
+// Because the length of the subject is unknown, and because we'd like to (a) be
 // able to handle subjects of any size and (b) avoid parsing the certificate
 // twice most of the time, once to discover the length and once to parse it, the
 // return value is overloaded.