config.tests: Fix architecture detection on Solaris

Escaping the '=' signs, otherwise awk fails on Solaris with

  awk: syntax error near line 1
  awk: bailing out near line 1

  Could not determine the target architecture!

  Build type: solaris-g++ (unknown, CPU features:)

Change-Id: I201482395c0cec28c10853191032eaa0401f5beb
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
basic manifest tool support in vc(x)proj generator

The removal of embed_manifest_dll or embed_manifest_exe from CONFIG
now disables the embedding of manifests in VS project files.

Task-number: QTBUG-5301

Change-Id: I031318883edca6f9b63a7981ef6c44e3f123f6fd
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>