8179892: Update build documentation for JDK 9

Reviewed-by: erikj

common/doc/testing.html

@@ -6,7 +6,7 @@
   <meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=yes">
   <title>Testing OpenJDK</title>
   <style type="text/css">code{white-space: pre;}</style>
-  <link rel="stylesheet" href="../../jdk/make/data/docs-resources/specs/resources/jdk-default.css">
+  <link rel="stylesheet" href="../../jdk/make/data/docs-resources/resources/jdk-default.css">
   <!--[if lt IE 9]>
     <script src="//cdnjs.cloudflare.com/ajax/libs/html5shiv/3.7.3/html5shiv-printshiv.min.js"></script>
   <![endif]-->

make/Init.gmk

@@ -327,7 +327,7 @@ else # HAS_SPEC=true
 	$(call ReportBuildTimes)
 	$(call PrintFailureReports)
 	$(call PrintBuildLogFailures)
-	$(PRINTF) "Hint: If caused by a warning, try configure --disable-warnings-as-errors.\n\n"
+	$(PRINTF) "Hint: See common/doc/building.html#troubleshooting for assistance.\n\n"
         ifneq ($(COMPARE_BUILD), )
 	  $(call CleanupCompareBuild)
         endif

make/UpdateBuildDocs.gmk

@@ -39,7 +39,7 @@ ifeq ($(PANDOC), )
   $(error Cannot continue)
 endif
 
-GLOBAL_SPECS_DEFAULT_CSS_FILE := $(JDK_TOPDIR)/make/data/docs-resources/specs/resources/jdk-default.css
+GLOBAL_SPECS_DEFAULT_CSS_FILE := $(JDK_TOPDIR)/make/data/docs-resources/resources/jdk-default.css
 
 ################################################################################
 
@@ -49,6 +49,7 @@ $(eval $(call SetupProcessMarkdown, building, \
   FILES := $(DOCS_DIR)/building.md, \
   DEST := $(DOCS_DIR), \
   CSS := $(GLOBAL_SPECS_DEFAULT_CSS_FILE), \
+  OPTIONS := --toc, \
 ))
 TARGETS += $(building)