Update various lib dependencies

Mostly to match the current versions in Gerrit Code Review. Leave
Guava for now as it requires a bit more work.

Change-Id: I6151c50d545efb2c18fde193f88b5a74acd18ecf

lib/jgit/BUCK

diff --git a/lib/jgit/BUCK b/lib/jgit/BUCK
index b3edc23..35b5491 100644
--- a/lib/jgit/BUCK
+++ b/lib/jgit/BUCK
@@ -1,10 +1,10 @@
-REPO = GERRIT
-VERS = '3.3.2.201404171909-r.128-g79448bc'
+REPO = MAVEN_CENTRAL
+VERS = '3.5.0.201409071800-rc1'
 
 maven_jar(
   name = 'jgit',
   id = 'org.eclipse.jgit:org.eclipse.jgit:' + VERS,
-  sha1 = 'a06d48637aa2952d18909244fd96f7483f148b7c',
+  sha1 = 'e520f25877d6ec940ac98faa5ffa97a75d83b653',
   repository = REPO,
   unsign = True,
   deps = [':ewah'],
@@ -18,7 +18,7 @@
 maven_jar(
   name = 'jgit-servlet',
   id = 'org.eclipse.jgit:org.eclipse.jgit.http.server:' + VERS,
-  sha1 = 'da9711d199d140a69d21eea70be2f13eca21935c',
+  sha1 = '089e041d5065a7aa30366c3f1610868bac50bdba',
   repository = REPO,
   deps = [':jgit'],
   unsign = True,
@@ -41,7 +41,7 @@
 maven_jar(
   name = 'jgit-archive_library',
   id = 'org.eclipse.jgit:org.eclipse.jgit.archive:' + VERS,
-  sha1 = '8574d1080a71fdd8b0a07a9eb85e51beba39149c',
+  sha1 = 'b335e60660653a6a421e76af5604d84ca526aa6a',
   repository = REPO,
   deps = [':jgit'],
   unsign = True,
@@ -54,7 +54,7 @@
 maven_jar(
   name = 'junit',
   id = 'org.eclipse.jgit:org.eclipse.jgit.junit:' + VERS,
-  sha1 = 'c4d232911178abfff65ba4b75cecd3ef31ad4211',
+  sha1 = '9253ab01d92ccd657290b5996defa64177e738d0',
   repository = REPO,
   unsign = True,
   deps = [':jgit'],

lib/slf4j/BUCK

diff --git a/lib/slf4j/BUCK b/lib/slf4j/BUCK
index 4d43e55..877deed 100644
--- a/lib/slf4j/BUCK
+++ b/lib/slf4j/BUCK
@@ -1,9 +1,9 @@
-VERS = '1.6.1'
+VERS = '1.7.7'
 
 maven_jar(
   name = 'slf4j-api',
   id = 'org.slf4j:slf4j-api:' + VERS,
-  sha1 = '6f3b8a24bf970f17289b234284c94f43eb42f0e4',
+  sha1 = '2b8019b6249bb05d81d3a3094e468753e2b21311',
   visibility = ['PUBLIC'],
 )
 
@@ -11,7 +11,7 @@
 maven_jar(
   name = 'slf4j-simple',
   id = 'org.slf4j:slf4j-simple:' + VERS,
-  sha1 = '58e59bfb3e247097b8122243b3bfe0049c8cfae8',
+  sha1 = '8095d0b9f7e0a9cd79a663c740e0f8fb31d0e2c8',
   deps = [':slf4j-api'],
   visibility = ['PUBLIC'],
 )