make expect_stdout work on Node.js 0.12 (#1623)

That particular version of Node.js has messed up error messages, so provide a version-specific workaround.

Also fixed an formatting issue which would cause `expect_stdout` to fail if error message contains excerpts of input.

Apply `expect_stdout` to more applicable tests.

test/compress/screw-ie8.js

@@ -128,6 +128,7 @@ do_screw_try_catch_undefined: {
             return void 0===o
         }
     }
+    expect_stdout: true
 }
 
 dont_screw_try_catch_undefined: {
@@ -156,6 +157,7 @@ dont_screw_try_catch_undefined: {
             return n === undefined
         }
     }
+    expect_stdout: true
 }
 
 reduce_vars: {
@@ -208,6 +210,7 @@ issue_1586_1: {
         }
     }
     expect_exact: "function f(){try{}catch(c){console.log(c.message)}}"
+    expect_stdout: true
 }
 
 issue_1586_2: {
@@ -226,4 +229,5 @@ issue_1586_2: {
         }
     }
     expect_exact: "function f(){try{}catch(c){console.log(c.message)}}"
+    expect_stdout: true
 }