Initial work on an AST dumper.

That will be pretty helpful to understand what's going wrong with
templates.

tests/manual/cplusplus-dump/cplusplus-dump.pro

@@ -0,0 +1,19 @@
+QT = core gui
+macx:CONFIG -= app_bundle
+TARGET = cplusplus0
+
+include(../../../src/libs/cplusplus/cplusplus-lib.pri)
+
+# Input
+SOURCES += main.cpp
+
+unix {
+    debug:OBJECTS_DIR = $${OUT_PWD}/.obj/debug-shared
+    release:OBJECTS_DIR = $${OUT_PWD}/.obj/release-shared
+
+    debug:MOC_DIR = $${OUT_PWD}/.moc/debug-shared
+    release:MOC_DIR = $${OUT_PWD}/.moc/release-shared
+
+    RCC_DIR = $${OUT_PWD}/.rcc/
+    UI_DIR = $${OUT_PWD}/.uic/
+}