Set 'device_cfg' parameter for iOS bots

tools/buildbot_spec.json

Index: tools/buildbot_spec.json
diff --git a/tools/buildbot_spec.json b/tools/buildbot_spec.json
index 1341b5ab967ff5d762b7ae4f1021c7d99fa0c068..fe68aaf651ba10a5cb30e0dfe35cb1ceb7c256ed 100644
--- a/tools/buildbot_spec.json
+++ b/tools/buildbot_spec.json
@@ -1165,7 +1165,6 @@
       "gpusrgb", 
       "msaa16", 
       "pdf", 
-      "pdf_poppler", 
       "serialize-8888", 
       "tiles_rt-8888", 
       "pic-8888", 
@@ -1444,7 +1443,6 @@
       "gpusrgb", 
       "msaa16", 
       "pdf", 
-      "pdf_poppler", 
       "serialize-8888", 
       "tiles_rt-8888", 
       "pic-8888", 
@@ -1724,7 +1722,6 @@
       "gpusrgb", 
       "msaa16", 
       "pdf", 
-      "pdf_poppler", 
       "serialize-8888", 
       "tiles_rt-8888", 
       "pic-8888", 
@@ -2004,7 +2001,6 @@
       "gpusrgb", 
       "msaa16", 
       "pdf", 
-      "pdf_poppler", 
       "serialize-8888", 
       "tiles_rt-8888", 
       "pic-8888", 
@@ -2329,7 +2325,6 @@
       "gpusrgb", 
       "msaa16", 
       "pdf", 
-      "pdf_poppler", 
       "serialize-8888", 
       "tiles_rt-8888", 
       "pic-8888", 
@@ -2654,7 +2649,6 @@
       "gpusrgb", 
       "msaa16", 
       "pdf", 
-      "pdf_poppler", 
       "serialize-8888", 
       "tiles_rt-8888", 
       "pic-8888", 
@@ -2973,7 +2967,6 @@
       "gpusrgb", 
       "msaa16", 
       "pdf", 
-      "pdf_poppler", 
       "serialize-8888", 
       "tiles_rt-8888", 
       "pic-8888", 
@@ -3620,7 +3613,6 @@
       "nvprdit16", 
       "msaa16", 
       "pdf", 
-      "pdf_poppler", 
       "serialize-8888", 
       "tiles_rt-8888", 
       "pic-8888", 
@@ -3996,7 +3988,6 @@
       "gpusrgb", 
       "msaa16", 
       "pdf", 
-      "pdf_poppler", 
       "serialize-8888", 
       "tiles_rt-8888", 
       "pic-8888", 
@@ -5179,7 +5170,6 @@
       "gpusrgb", 
       "msaa16", 
       "pdf", 
-      "pdf_poppler", 
       "serialize-8888", 
       "tiles_rt-8888", 
       "pic-8888", 
@@ -5460,7 +5450,6 @@
       "gpusrgb", 
       "msaa16", 
       "pdf", 
-      "pdf_poppler", 
       "serialize-8888", 
       "tiles_rt-8888", 
       "pic-8888", 
@@ -5878,7 +5867,6 @@
       "2ndpic-8888", 
       "msaa16", 
       "pdf", 
-      "pdf_poppler", 
       "serialize-8888", 
       "tiles_rt-8888", 
       "pic-8888", 
@@ -6166,7 +6154,6 @@
       "2ndpic-8888", 
       "msaa16", 
       "pdf", 
-      "pdf_poppler", 
       "serialize-8888", 
       "tiles_rt-8888", 
       "pic-8888", 
@@ -6452,7 +6439,6 @@
       "2ndpic-8888", 
       "msaa16", 
       "pdf", 
-      "pdf_poppler", 
       "serialize-8888", 
       "tiles_rt-8888", 
       "pic-8888", 
@@ -6739,7 +6725,6 @@
       "2ndpic-8888", 
       "msaa16", 
       "pdf", 
-      "pdf_poppler", 
       "serialize-8888", 
       "tiles_rt-8888", 
       "pic-8888", 
@@ -7026,7 +7011,6 @@
       "2ndpic-8888", 
       "msaa16", 
       "pdf", 
-      "pdf_poppler", 
       "serialize-8888", 
       "tiles_rt-8888", 
       "pic-8888", 
@@ -7310,7 +7294,6 @@
       "nvprdit16", 
       "msaa16", 
       "pdf", 
-      "pdf_poppler", 
       "serialize-8888", 
       "tiles_rt-8888", 
       "pic-8888", 
@@ -7714,7 +7697,6 @@
       "gpusrgb", 
       "msaa16", 
       "pdf", 
-      "pdf_poppler", 
       "serialize-8888", 
       "tiles_rt-8888", 
       "pic-8888", 
@@ -8042,7 +8024,6 @@
       "gpusrgb", 
       "msaa16", 
       "pdf", 
-      "pdf_poppler", 
       "serialize-8888", 
       "tiles_rt-8888", 
       "pic-8888", 
@@ -8455,6 +8436,7 @@
       "role": "Test"
     }, 
     "configuration": "Debug", 
+    "device_cfg": "iPad4,1", 
     "dm_flags": [
       "--config", 
       "565", 
@@ -8462,7 +8444,6 @@
       "gpu", 
       "gpusrgb", 
       "pdf", 
-      "pdf_poppler", 
       "serialize-8888", 
       "tiles_rt-8888", 
       "pic-8888",