Bug 1528499 - Don't PGO the base-toolchain tasks on release branches. r=ted

Differential Revision: https://phabricator.services.mozilla.com/D20080

browser/config/mozconfigs/linux64/beta

@@ -1,4 +1,4 @@
-export MOZ_PGO=1
+. "$topsrcdir/build/mozconfig.pgo"
 
 . "$topsrcdir/browser/config/mozconfigs/linux64/common-opt"
 

browser/config/mozconfigs/linux64/release

@@ -1,7 +1,7 @@
 # This make file should be identical to the beta mozconfig, apart from the
 # safeguard below
 
-export MOZ_PGO=1
+. "$topsrcdir/build/mozconfig.pgo"
 
 . "$topsrcdir/browser/config/mozconfigs/linux64/common-opt"
 

browser/config/mozconfigs/whitelist

@@ -42,7 +42,7 @@ whitelist['release']['linux32'] += [
 whitelist['release']['linux64'] += [
     'export MOZILLA_OFFICIAL=1',
     'export MOZ_TELEMETRY_REPORTING=1',
-    'export MOZ_PGO=1',
+    '. "$topsrcdir/build/mozconfig.pgo"',
 ]
 
 if __name__ == '__main__':

build/mozconfig.pgo

@@ -0,0 +1,7 @@
+case "$PERFHERDER_EXTRA_OPTIONS" in
+base-toolchains*)
+    ;;
+*)
+    export MOZ_PGO=1
+    ;;
+esac