Add input file glob support to minify()

test/input/issue-1242/bar.es5

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+function bar(x) {
+    var triple = x * (2 + 1);
+    return triple;
+}

test/input/issue-1242/baz.es5

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+function baz(x) {
+    var half = x / 2;
+    return half;
+}

test/input/issue-1242/foo.es5

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+var print = console.log.bind(console);
+function foo(x) {
+    var twice = x * 2;
+    print('Foo:', twice);
+}

test/input/issue-1242/qux.js

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+var a = bar(1+2);
+var b = baz(3+9);
+print('q' + 'u' + 'x', a, b);
+foo(5+6);

test/mocha/glob.js

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+var Uglify = require('../../');
+var assert = require("assert");
+
+describe("minify() with input file globs", function() {
+    it("minify() with one input file glob string.", function() {
+        var result = Uglify.minify("test/input/issue-1242/foo.*", {
+            compress: { collapse_vars: true }
+        });
+        assert.strictEqual(result.code, 'function foo(o){print("Foo:",2*o)}var print=console.log.bind(console);');
+    });
+    it("minify() with an array of one input file glob.", function() {
+        var result = Uglify.minify([
+            "test/input/issue-1242/b*.es5",
+        ], {
+            compress: { collapse_vars: true }
+        });
+        assert.strictEqual(result.code, 'function bar(n){return 3*n}function baz(n){return n/2}');
+    });
+    it("minify() with an array of multiple input file globs.", function() {
+        var result = Uglify.minify([
+            "test/input/issue-1242/???.es5",
+            "test/input/issue-1242/*.js",
+        ], {
+            compress: { collapse_vars: true }
+        });
+        assert.strictEqual(result.code, 'function bar(n){return 3*n}function baz(n){return n/2}function foo(n){print("Foo:",2*n)}var print=console.log.bind(console);print("qux",bar(3),baz(12)),foo(11);');
+    });
+});