Log the error when there is a problem with the binary

This is a messy first cut. We can revisit this in upcomming patches.
The value this will bring to debugging installation errors makes
this worth considered we're about to release a LibSass bump.

Fixes #1161

scripts/build.js

@@ -209,7 +209,7 @@ function testBinary(options) {
 
     console.log('Binary is fine; exiting.');
   } catch (e) {
-    console.log(['Problem with the binary.', 'Manual build incoming.'].join(eol));
+    console.log(['Problem with the binary:', e, 'Manual build incoming.'].join(eol));
 
     return build(options);
   }