Ensure builds are reproducible (#842)

CHANGES.md

@@ -17,7 +17,7 @@ Translations 🗣:
  -
 
 Build 🧱:
- -
+ - Ensure builds are reproducible (#842)
 
 Changes in RiotX 0.13.0 (2020-01-17)
 ===================================================

matrix-sdk-android/build.gradle

@@ -74,7 +74,7 @@ android {
 }
 
 static def gitRevision() {
-    def cmd = "git rev-parse --short HEAD"
+    def cmd = "git rev-parse --short=8 HEAD"
     return cmd.execute().text.trim()
 }
 

vector/build.gradle

@@ -45,7 +45,7 @@ def getVersionCode() {
 }
 
 static def gitRevision() {
-    def cmd = "git rev-parse --short HEAD"
+    def cmd = "git rev-parse --short=8 HEAD"
     return cmd.execute().text.trim()
 }