Move MiMa checks for irJS and toolJS to the bootstrap task.

This is a cosmetic change in the CI matrix to simplify dropping
2.10 support at the language/library level without dropping it at
the (JVM) tools level.

Author: sjrd

ci/matrix.xml

@@ -166,7 +166,8 @@
     sbt ++$scala toolsJS/bootstrapTest &&
     sbt ++$scala testSuite/test:fullOptJS &&
     sbt 'set scalaJSStage in Global := FullOptStage' \
-        ++$scala toolsJS/bootstrapTest
+        ++$scala toolsJS/bootstrapTest &&
+    sbt ++$scala irJS/mimaReportBinaryIssues toolsJS/mimaReportBinaryIssues
   ]]></task>
 
   <task id="tools-stubs"><![CDATA[
@@ -178,8 +179,7 @@
         jsEnvs/mimaReportBinaryIssues jsEnvsTestKit/mimaReportBinaryIssues \
         nodeJSEnv/mimaReportBinaryIssues \
         testAdapter/mimaReportBinaryIssues \
-        stubs/mimaReportBinaryIssues \
-        irJS/mimaReportBinaryIssues toolsJS/mimaReportBinaryIssues &&
+        stubs/mimaReportBinaryIssues &&
     sbt ++$scala ir/compile:doc tools/compile:doc jsEnvs/compile:doc \
         jsEnvsTestKit/compile:doc nodeJSEnv/compile:doc \
         testAdapter/compile:doc stubs/compile:doc
@@ -196,8 +196,7 @@
         nodeJSEnv/mimaReportBinaryIssues \
         testAdapter/mimaReportBinaryIssues \
         stubs/mimaReportBinaryIssues \
-        sbtPlugin/mimaReportBinaryIssues \
-        irJS/mimaReportBinaryIssues toolsJS/mimaReportBinaryIssues &&
+        sbtPlugin/mimaReportBinaryIssues &&
     sbt ++$scala library/scalastyle javalanglib/scalastyle javalib/scalastyle \
         ir/scalastyle compiler/scalastyle \
         compiler/test:scalastyle tools/scalastyle tools/test:scalastyle \