de-duplicate doc templates

Change-Id: I6672b08ac8b8ea8de76d3a3850330a8dda2d6767
Reviewed-on: http://codereview.qt.nokia.com/285


Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Daniel Teske <daniel.teske@nokia.com>

doc/api/api.pro

@@ -27,13 +27,14 @@ HELPGENERATOR = $$targetPath($$[QT_INSTALL_BINS]/qhelpgenerator)
 
 VERSION_TAG = $$replace(QTCREATOR_VERSION, "[-.]", )
 
+srcdir = $$cleanPath($$PWD/..)
 equals(QMAKE_DIR_SEP, /) {   # unix, mingw+msys
-    QDOC = SRCDIR=$$PWD OUTDIR=$$OUT_PWD/doc/html QTC_VERSION=$$QTCREATOR_VERSION QTC_VERSION_TAG=$$VERSION_TAG $$QDOC_BIN
+    QDOC = SRCDIR=$$srcdir OUTDIR=$$OUT_PWD/doc/html QTC_VERSION=$$QTCREATOR_VERSION QTC_VERSION_TAG=$$VERSION_TAG $$QDOC_BIN
 } else:win32-g++* {   # just mingw
     # The lack of spaces in front of the && is necessary!
-    QDOC = set SRCDIR=$$PWD&& set OUTDIR=$$OUT_PWD/doc/html&& set QTC_VERSION=$$QTCREATOR_VERSION&& set QTC_VERSION_TAG=$$VERSION_TAG&& $$QDOC_BIN
+    QDOC = set SRCDIR=$$srcdir&& set OUTDIR=$$OUT_PWD/doc/html&& set QTC_VERSION=$$QTCREATOR_VERSION&& set QTC_VERSION_TAG=$$VERSION_TAG&& $$QDOC_BIN
 } else {   # nmake
-    QDOC = set SRCDIR=$$PWD $$escape_expand(\\n\\t) \
+    QDOC = set SRCDIR=$$srcdir $$escape_expand(\\n\\t) \
            set OUTDIR=$$OUT_PWD/doc/html $$escape_expand(\\n\\t) \
            set QTC_VERSION=$$QTCREATOR_VERSION $$escape_expand(\\n\\t) \
            set QTC_VERSION_TAG=$$VERSION_TAG $$escape_expand(\\n\\t) \