Upgrade gitiles to version 0.3

This version aligns the version of commons-compress with the version
used in gerrit.

Full list of changes since 0.2-9:

- Bump version to 0.3
- Update Apache commons compress to 1.18.0 [reland]
- Error Prone: Enable DateFormatConstant at ERROR severity
- Bazel: Sort Error Prone error definitions in package configuration
- DateFormatter: Reduce visibility of constructor used for tests
- PathServlet: Suppress ImmutableEnumChecker warning
- ArchiveFormat: Suppress ImmutableEnumChecker warning
- Bazel: Increase severity of ReferenceEquality to ERROR
- ViewFilter: Fix reference comparison of Revision
- MarkdownConfig: Fix reference comparison with Boolean.TRUE
- Bazel: Increase severity of ImmutableAnnotationChecker to ERROR
- VisibilityChecker: Remove unnecessary suppression of 'unused'
- VisibilityCheckerTest: Open TestRepository in try-with-resource
- VisibilityCache: Split the visibility checks from the actual caching
- BaseServlet: Add Javadoc for IOException to prevent Eclipse warnings
- Revision: Add helper method for comparison to Revision.NULL
- VisibilityCacheTest: Open TestRepository in try-with-resource

Change-Id: I936ab7d2a7fe5f144e3230167f2b1d2c2e07be0b

WORKSPACE

@@ -726,7 +726,7 @@ maven_jar(
     sha1 = "f7be08ec23c21485b9b5a1cf1654c2ec8c58168d",
 )
 
-GITILES_VERS = "0.2-9"
+GITILES_VERS = "0.3"
 
 GITILES_REPO = GERRIT
 
@@ -735,14 +735,14 @@ maven_jar(
     artifact = "com.google.gitiles:blame-cache:" + GITILES_VERS,
     attach_source = False,
     repository = GITILES_REPO,
-    sha1 = "8248f6a8b0863990fe519e9d0de39ec5dc99c189",
+    sha1 = "8866f5a4e087c698d87c8d9c7d1cdf96e858afcd",
 )
 
 maven_jar(
     name = "gitiles-servlet",
     artifact = "com.google.gitiles:gitiles-servlet:" + GITILES_VERS,
     repository = GITILES_REPO,
-    sha1 = "cb47a8f1d84645acddfe2945a63ce8ce5c22a53e",
+    sha1 = "baa298b5656f5d91b26c880c79e47509e623615a",
 )
 
 # prettify must match the version used in Gitiles