audit: suggest setting JAVA_HOME by depends_on :java

Closes Homebrew/homebrew#37174.

Signed-off-by: Xu Cheng <xucheng@me.com>

Library/Homebrew/cmd/audit.rb

@@ -198,6 +198,12 @@ class FormulaAuditor
     end
   end
 
+  def audit_java_home
+    if text =~ /JAVA_HOME/i && !formula.requirements.map(&:class).include?(JavaDependency)
+      problem "Use `depends_on :java` to set JAVA_HOME"
+    end
+  end
+
   def audit_conflicts
     formula.conflicts.each do |c|
       begin
@@ -760,6 +766,7 @@ class FormulaAuditor
     audit_specs
     audit_urls
     audit_deps
+    audit_java_home
     audit_conflicts
     audit_options
     audit_patches