azure-pipeline-rpi.yml: increase timeout for build jobs

The default timeout for azure jobs is 60 minutes but currently the
build for rpi braches is failing because of that, and for now this
value will be increased to 75 minutes.

Signed-off-by: Andreea Andrisan <Andreea.Andrisan@analog.com>

Author: AAndrisa

azure-pipelines-rpi.yml

@@ -31,6 +31,7 @@ stages:
       displayName: 'Checkpatch Script'
 
   - job: BuildDockerized
+    timeoutInMinutes: 75
     strategy:
       matrix:
         bcm2709_arm_adi: