chore(cdk-build-tools): print build times for all packages (#10681)

Print the build times for all packages, irrespective of their success or
failure.

The motivation is to gather package build times and their contribution
to the total build time of the repo.


----

*By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*

tools/cdk-build-tools/bin/cdk-build.ts

@@ -2,7 +2,7 @@ import * as yargs from 'yargs';
 import { compileCurrentPackage } from '../lib/compile';
 import { lintCurrentPackage } from '../lib/lint';
 import { shell } from '../lib/os';
-import { cdkBuildOptions, CompilerOverrides } from '../lib/package-info';
+import { cdkBuildOptions, currentPackageJson, CompilerOverrides } from '../lib/package-info';
 import { Timers } from '../lib/timer';
 
 async function main() {
@@ -54,12 +54,12 @@ async function main() {
 const timers = new Timers();
 const buildTimer = timers.start('Total time');
 
-main().then(() => {
-  buildTimer.end();
-}).catch(e => {
-  buildTimer.end();
+main().catch(e => {
   process.stderr.write(`${e.toString()}\n`);
-  process.stderr.write(`Build failed. ${timers.display()}\n`);
+  process.stderr.write('Build failed.');
   process.stderr.write('!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!\n');
   process.exit(1);
+}).finally(() => {
+  buildTimer.end();
+  process.stdout.write(`Build times for ${currentPackageJson().name}: ${timers.display()}\n`);
 });