Allow per device timeout configurations.

Pesky emulator.

Change-Id: Ie49bd93c2393172e41cd35b7b8f03ecb20b6582a

test/device.cfg

@@ -23,6 +23,11 @@ triples = {
     'hammerhead': 'arm-linux-androideabi',
 }
 
+timeouts = {
+    'generic_x86': '120',
+    'hammerhead': '60',
+}
+
 # use -I
 includes = {
     'generic': [
@@ -231,3 +236,6 @@ config.ldflags = (
 )
 config.crtbegin = os.path.join(config.android_root, crtbegin)
 config.crtend = os.path.join(config.android_root, crtend)
+
+if device in timeouts:
+    config.timeout = timeouts[device]