Bug 1360781 - Add Stylo dependencies for ./mach bootstrap on FreeBSD. r=froydnj

MozReview-Commit-ID: 3cD8frPKXnW

--HG--
extra : rebase_source : a2172145af1aec80eb6a67a0a9bd06ab0ec22130

python/mozboot/mozboot/freebsd.py

@@ -4,6 +4,14 @@
 
 from mozboot.base import BaseBootstrapper
 
+STYLO_MOZCONFIG = '''
+To enable Stylo in your builds, paste the lines between the chevrons
+(>>> and <<<) into your mozconfig file:
+
+<<<
+ac_add_options --enable-stylo
+>>>
+'''
 
 class FreeBSDBootstrapper(BaseBootstrapper):
     def __init__(self, version, flavor, **kwargs):
@@ -62,5 +70,12 @@ class FreeBSDBootstrapper(BaseBootstrapper):
         # TODO: Figure out what not to install for artifact mode
         self.pkg_install(*self.browser_packages)
 
+    def ensure_stylo_packages(self, state_dir):
+        self.pkg_install('llvm39')
+
+    def suggest_browser_mozconfig(self):
+        if self.stylo:
+            print(STYLO_MOZCONFIG)
+
     def upgrade_mercurial(self, current):
         self.pkg_install('mercurial')