Update Play services and add checksum

Quoting Google employee: "5.0.77 had some serious issues, team didn't want
anyone using it"

// FREEBIE

build.gradle

@@ -25,7 +25,7 @@ dependencies {
     compile 'com.actionbarsherlock:actionbarsherlock:4.4.0@aar'
     compile 'com.android.support:support-v4:19.1.0'
     compile 'se.emilsjolander:stickylistheaders:2.2.0'
-    compile 'com.google.android.gms:play-services:5.0.77'
+    compile 'com.google.android.gms:play-services:5.0.89'
     compile 'com.astuetz:pagerslidingtabstrip:1.0.1'
 
     androidTestCompile 'com.squareup:fest-android:1.0.8'
@@ -38,6 +38,7 @@ dependencyVerification {
         'com.actionbarsherlock:actionbarsherlock:5ab04d74101f70024b222e3ff9c87bee151ec43331b4a2134b6cc08cf8565819',
         'com.android.support:support-v4:3f40fa7b3a4ead01ce15dce9453b061646e7fe2e7c51cb75ca01ee1e77037f3f',
         'se.emilsjolander:stickylistheaders:89146b46c96fea0e40200474a2625cda10fe94891e4128f53cdb42375091b9b6',
+        'com.google.android.gms:play-services:38f326e525830f1d70f60f594ceafcbdf5b312287ddbecd338fd1ed7958a4b1e',
         'com.astuetz:pagerslidingtabstrip:f1641396732c7132a7abb837e482e5ee2b0ebb8d10813fc52bbaec2c15c184c2',
         'com.google.protobuf:protobuf-java:ad9769a22989e688a46af4d3accc348cc501ced22118033230542bc916e33f0b',
         'com.madgag:sc-light-jdk15on:931f39d351429fb96c2f749e7ecb1a256a8ebbf5edca7995c9cc085b94d1841d',