gclient: add depot_tools to PATH

recipe_modules/gclient/example.expected/basic.json

Index: recipe_modules/gclient/example.expected/basic.json
diff --git a/recipe_modules/gclient/example.expected/basic.json b/recipe_modules/gclient/example.expected/basic.json
index 15d9d2f40d7fd6fdda79e56cce51b4cbe48c1ff6..46c74809df03069d97da2ffd51b9e6ee735263e1 100644
--- a/recipe_modules/gclient/example.expected/basic.json
+++ b/recipe_modules/gclient/example.expected/basic.json
@@ -9,6 +9,9 @@
       "cache_dir = '[ROOT]/git_cache'\nsolutions = [{'deps_file': '.DEPS.git', 'managed': True, 'name': 'src', 'url': 'https://chromium.googlesource.com/chromium/src.git'}]"
     ],
     "cwd": "[SLAVE_BUILD]",
+    "env": {
+      "PATH": "%(PATH)s:RECIPE_PACKAGE[depot_tools]"

[Michael Achenbach, 2016/02/05 11:56:41]

This %(PATH)s doesn't really look right.

+    },
     "name": "gclient setup"
   },
   {
@@ -30,6 +33,9 @@
       "/path/to/tmp/json"
     ],
     "cwd": "[SLAVE_BUILD]",
+    "env": {
+      "PATH": "%(PATH)s:RECIPE_PACKAGE[depot_tools]"
+    },
     "name": "gclient sync",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@json.output@{@@@",
@@ -54,6 +60,9 @@
       "local_bot"
     ],
     "cwd": "[SLAVE_BUILD]",
+    "env": {
+      "PATH": "%(PATH)s:RECIPE_PACKAGE[depot_tools]"
+    },
     "name": "gclient recurse (git config user.name)"
   },
   {
@@ -68,6 +77,9 @@
       "local_bot@example.com"
     ],
     "cwd": "[SLAVE_BUILD]",
+    "env": {
+      "PATH": "%(PATH)s:RECIPE_PACKAGE[depot_tools]"
+    },
     "name": "gclient recurse (git config user.email)"
   },
   {
@@ -80,6 +92,9 @@
       "cache_dir = None\nsolutions = [{'deps_file': 'DEPS', 'managed': True, 'name': 'WebKit', 'safesync_url': 'https://blink-status.appspot.com/lkgr', 'url': 'svn://svn.chromium.org/blink/trunk'}]"
     ],
     "cwd": "[SLAVE_BUILD]/src/third_party",
+    "env": {
+      "PATH": "%(PATH)s:RECIPE_PACKAGE[depot_tools]"
+    },
     "name": "[spec: WebKit] gclient setup"
   },
   {
@@ -99,6 +114,9 @@
       "/path/to/tmp/json"
     ],
     "cwd": "[SLAVE_BUILD]/src/third_party",
+    "env": {
+      "PATH": "%(PATH)s:RECIPE_PACKAGE[depot_tools]"
+    },
     "name": "[spec: WebKit] gclient sync",
     "~followup_annotations": [
       "@@@STEP_LOG_LINE@json.output@{@@@",
@@ -147,6 +165,9 @@
       "runhooks"
     ],
     "cwd": "[SLAVE_BUILD]",
+    "env": {
+      "PATH": "%(PATH)s:RECIPE_PACKAGE[depot_tools]"
+    },
     "name": "gclient runhooks"
   },
   {