QbsProjectManager: Support generic Unix targets.

The profiles that we currently create do not work with any non-Linux,
non-Mac Unix system.
Note: This patch introduces some additional redundancy to keep the risk
close to zero. Clean-up can be done later in a non-frozen branch.

Task-number: QTCREATORBUG-10968
Change-Id: I4e150d641a726826b8f3bae4b4a25d80c51f08c9
Reviewed-by: Denis Shienkov <denis.shienkov@gmail.com>
Reviewed-by: Tim Sander <tim@krieglstein.org>
Reviewed-by: Eike Ziller <eike.ziller@digia.com>
Reviewed-by: Tobias Hunger <tobias.hunger@digia.com>

src/plugins/qbsprojectmanager/defaultpropertyprovider.cpp

@@ -117,6 +117,17 @@ QVariantMap DefaultPropertyProvider::properties(const ProjectExplorer::Kit *k, c
                             << QLatin1String("llvm")
                             << QLatin1String("gcc"));
             }
+        } else {
+            // TODO: Factor out toolchain type setting.
+            data.insert(QLatin1String(QBS_TARGETOS), QStringList() << QLatin1String("unix"));
+            if (tc->type() != QLatin1String("clang")) {
+                data.insert(QLatin1String(QBS_TOOLCHAIN), QLatin1String("gcc"));
+            } else {
+                data.insert(QLatin1String(QBS_TOOLCHAIN),
+                            QStringList() << QLatin1String("clang")
+                            << QLatin1String("llvm")
+                            << QLatin1String("gcc"));
+            }
         }
         Utils::FileName cxx = tc->compilerCommand();
         data.insert(QLatin1String(CPP_TOOLCHAINPATH), cxx.toFileInfo().absolutePath());