Merge bitcoin-core/secp256k1#1144: Cleanup .gitignore file

f5039cb Cleanup `.gitignore` file (Hennadii Stepanov)
798727a Revert "Add test logs to gitignore" (Hennadii Stepanov)

Pull request description:

ACKs for top commit:
  jonasnick:
    ACK f5039cb
  real-or-random:
    ACK f5039cb

Tree-SHA512: 3586329e77958a9bfa06dd84e5b121cd456e93332670d5afc1a6691e165cdfa5a6fd6a61f82be12ec33f2a58b26a13adfedeb177ae1056202e53a530949fc549

.gitignore

@@ -13,7 +13,6 @@ schnorr_example
 *.so
 *.a
 *.csv
-!.gitignore
 *.log
 *.trs
 
@@ -34,8 +33,6 @@ libtool
 *.lo
 *.o
 *~
-*.log
-*.trs
 
 coverage/
 coverage.html