Fixed transient compile failure with highly parallel jom.

These .pri files which add to INCLUDEPATH and have FORMS should also add
to DEPENDPATH.

Adding to INCLUDEPATH does not add to DEPENDPATH by default with qmake.
That means qmake may not find headers in those paths and won't
consider them dependencies when compiling the source files which include
them.

This doesn't matter when all the headers in the new INCLUDEPATH are
always present, but when some of them are generated (e.g. from FORMS),
the dependencies are important and omitting them means a race condition
in parallel builds.

Fixes errors of the form:
  ..\..\shared\help\topicchooser.h(33) : fatal error C1083: Cannot open
    include file: 'ui_topicchooser.h': No such file or directory
(cherry picked from commit 9a7e0294)

src/plugins/debugger/cdb/cdb.pri

@@ -27,6 +27,7 @@ CDB_PLATFORM=i386
 
 INCLUDEPATH*=$$CDB_PATH
 INCLUDEPATH*=$$PWD
+DEPENDPATH*=$$PWD
 
 CDB_LIBPATH=$$CDB_PATH/lib/$$CDB_PLATFORM
 

src/plugins/designer/cpp/cpp.pri

 INCLUDEPATH+=$$PWD
+DEPENDPATH+=$$PWD
 
 DEFINES+=CPP_ENABLED
 

src/plugins/git/gitorious/gitorious.pri

 QT += network
 INCLUDEPATH+=$$PWD
+DEPENDPATH+=$$PWD
 
 HEADERS += $$PWD/gitoriousclonewizard.h \
            $$PWD/gitorioushostwizardpage.h \

src/plugins/qt4projectmanager/customwidgetwizard/customwidgetwizard.pri

 INCLUDEPATH *= $$PWD
+DEPENDPATH *= $$PWD
 SOURCES += \
  $$PWD/plugingenerator.cpp \
  $$PWD/classlist.cpp \

src/shared/help/help.pri

 VPATH += $$PWD
 
 INCLUDEPATH *= $$PWD $$PWD/..
+DEPENDPATH *= $$PWD $$PWD/..
 
 # Input
 HEADERS += \

src/shared/proparser/proparser.pri

@@ -2,6 +2,7 @@ VPATH += $$PWD
 QT += xml
 
 INCLUDEPATH *= $$PWD $$PWD/..
+DEPENDPATH *= $$PWD $$PWD/..
 
 # Input
 HEADERS += \

src/shared/qrceditor/qrceditor.pri

 INCLUDEPATH *= $$PWD $$PWD/..
+DEPENDPATH *= $$PWD $$PWD/..
 
 QT *= xml