Version bump: 2 -> 3.

Change-Id: Ic3305debe9c5d85b1c47be4ebcdfcbd0660f49af
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/50865
Commit-Queue: Adam Langley <agl@google.com>
Reviewed-by: David Benjamin <davidben@google.com>
Commit-Queue: David Benjamin <davidben@google.com>

crypto/mem.c

@@ -132,7 +132,7 @@ static const uint8_t kBoringSSLBinaryTag[18] = {
     0x8c, 0x62, 0x20, 0x0b, 0xd2, 0xa0, 0x72, 0x58,
     0x44, 0xa8, 0x96, 0x69, 0xad, 0x55, 0x7e, 0xec,
     // Current source iteration. Incremented ~monthly.
-    2, 0,
+    3, 0,
 };
 
 void *OPENSSL_malloc(size_t size) {