Bump up Quiche and BoringSSL sha (java-native-access#336)

Motivation:

We are not depending on the current head of the quiche tree.

Modifications:

- Update to latest quiche sha
- Update BoringSSL sha to be consistent with what quiche itself use as sub-module.

Result:

Use latest quiche code

pom.xml

@@ -86,7 +86,7 @@
  <!-- Follow what is used in quiche for now -->
  <!-- https://github.com/cloudflare/quiche/tree/master/deps -->
  <boringsslBranch>master</boringsslBranch>
- <boringsslCommitSha>a2278d4d2cabe73f6663e3299ea7808edfa306b9</boringsslCommitSha>
+ <boringsslCommitSha>19fe7943ce593068bf447f05c2dbed4a324146ef</boringsslCommitSha>
 
  <quicheSourceDir>${project.build.directory}/quiche-source</quicheSourceDir>
  <quicheBuildDir>${quicheSourceDir}/target/release</quicheBuildDir>
@@ -95,7 +95,7 @@
  <quicheHomeIncludeDir>${quicheHomeDir}/include</quicheHomeIncludeDir>
  <quicheRepository>https://github.com/cloudflare/quiche</quicheRepository>
  <quicheBranch>master</quicheBranch>
- <quicheCommitSha>e9f59a55f5b56999d0e609a73aa8f1b450878a0c</quicheCommitSha>
+ <quicheCommitSha>fe56de9c7a1117621ea01edc165bc5635f37fe27</quicheCommitSha>
  <generatedSourcesDir>${project.build.directory}/generated-sources</generatedSourcesDir>
  <templateDir>${project.build.directory}/template</templateDir>
  <cargoTarget />