Start testing Chisel 3 in Travis

Now that we have verilator support we can start testing the Chisel 3
Verilog on Travis.  This disables Chisel 2 Travis tests because they're
too slow.

.travis.yml

@@ -32,17 +32,17 @@ addons:
 
 env:
   matrix:
-    - CONFIG=DefaultConfig
-    - CONFIG=DefaultL2Config
-    - CONFIG=RoccExampleConfig
-    - CONFIG=DualCoreConfig
-    - CONFIG=MemtestConfig
-    - CONFIG=FancyMemtestConfig
-    - CONFIG=BroadcastRegressionTestConfig
-    - CONFIG=CacheRegressionTestConfig
-    - CONFIG=NastiConverterTestConfig
-    - CONFIG=UnitTestConfig
-    - CONFIG=SplitL2MetadataTestConfig
+    - CONFIG=DefaultConfig                  CHISEL_VERSION=3
+    - CONFIG=DefaultL2Config                CHISEL_VERSION=3
+    - CONFIG=RoccExampleConfig              CHISEL_VERSION=3
+    - CONFIG=DualCoreConfig                 CHISEL_VERSION=3
+    - CONFIG=MemtestConfig                  CHISEL_VERSION=3
+    - CONFIG=FancyMemtestConfig             CHISEL_VERSION=3
+    - CONFIG=BroadcastRegressionTestConfig  CHISEL_VERSION=3
+    - CONFIG=CacheRegressionTestConfig      CHISEL_VERSION=3
+    - CONFIG=NastiConverterTestConfig       CHISEL_VERSION=3
+    - CONFIG=UnitTestConfig                 CHISEL_VERSION=3
+    - CONFIG=SplitL2MetadataTestConfig      CHISEL_VERSION=3
 
 # blacklist private branches
 branches:
@@ -55,11 +55,11 @@ before_install:
   - export CXX=g++-4.8 CC=gcc-4.8
 
 script:
-  - make vsim-verilog -C regression CONFIG=$CONFIG TORTURE_CONFIG=default CHISEL_VERSION=3
-  - make fsim-verilog -C regression CONFIG=$CONFIG TORTURE_CONFIG=default
-  - make emulator-ndebug -C regression CONFIG=$CONFIG TORTURE_CONFIG=default
-  - make emulator-asm-tests   -C regression CONFIG=$CONFIG TORTURE_CONFIG=default
-  - make emulator-bmark-tests -C regression CONFIG=$CONFIG TORTURE_CONFIG=default -j1
+  - make vsim-verilog -C regression CONFIG=$CONFIG TORTURE_CONFIG=default CHISEL_VERSION=$CHISEL_VERSION
+  - make fsim-verilog -C regression CONFIG=$CONFIG TORTURE_CONFIG=default CHISEL_VERSION=$CHISEL_VERSION
+  - make emulator-ndebug -C regression CONFIG=$CONFIG TORTURE_CONFIG=default CHISEL_VERSION=$CHISEL_VERSION
+  - make emulator-asm-tests   -C regression CONFIG=$CONFIG TORTURE_CONFIG=default CHISEL_VERSION=$CHISEL_VERSION
+  - make emulator-bmark-tests -C regression CONFIG=$CONFIG TORTURE_CONFIG=default CHISEL_VERSION=$CHISEL_VERSION -j1
 
 before_cache:
   - ls -tr regression/install | tail -n+2 | sed s@^@regression/install/@ | xargs rm -rf