[NaCl SDK] Fix template.mk to check for missing html page inside recipe.

I was seeing the error: "recipe commences before first target. Stop"
http://www.gnu.org/software/make/manual/html_node/Error-Messages.html

BUG=none
TBR=noelallen@chromium.org
NOTRY=true


Review URL: https://chromiumcodereview.appspot.com/10828357

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@152108 0039d316-1c4b-4281-b951-d872f2087c98

native_client_sdk/src/build_tools/template.mk

@@ -115,12 +115,11 @@ RUN: all
 CONFIG?=Debug
 PAGE?=index_$(TOOLCHAIN)_$(CONFIG).html
 
+LAUNCH: CHECK_FOR_CHROME all
 ifeq (,$(wildcard $(PAGE)))
 	$(warning No valid HTML page found at $(PAGE))
 	$(error Make sure TOOLCHAIN and CONFIG are properly set)
 endif
-
-LAUNCH: CHECK_FOR_CHROME all
 	$(CHROME_PATH) $(NEXE_ARGS) --register-pepper-plugins="$(PPAPI_DEBUG),$(PPAPI_RELEASE)" localhost:5103/$(PAGE)
 
 __PROJECT_POSTLAUNCH__