Fix cross compilation build for ARM

* Add some INSTALLS directives to .pro files. They are used by
  QtCreator to deploy code to target devices, so it makes sense to
  deploy the examples and test support library as well.
* Add the skins plugins explicitly when adding test support;
  otherwise this won't build. This Might be a problem of the toolchain
  though.

features/qskconfig.pri

@@ -23,6 +23,7 @@ QSK_INSTALL_HEADERS   = $${QSK_INSTALL_PREFIX}/include
 QSK_INSTALL_LIBS      = $${QSK_INSTALL_PREFIX}/lib
 QSK_INSTALL_BINS      = $${QSK_INSTALL_PREFIX}/bin
 QSK_INSTALL_PLUGINS   = $${QSK_INSTALL_PREFIX}/plugins
+QSK_INSTALL_EXAMPLES  = $${QSK_INSTALL_PREFIX}/examples
 
 CONFIG           += no_private_qt_headers_warning
 

features/qskexample.prf

@@ -3,3 +3,6 @@ CONFIG      += qskinny qsktestsupport
 
 DEFINES     += QSK_DLL
 DESTDIR      = $$clean_path( $${OUT_PWD}/../bin )
+
+target.path    = $${QSK_INSTALL_EXAMPLES}
+INSTALLS       = target

features/qsktestsupport.prf

@@ -5,3 +5,6 @@ DEPENDPATH  *= $${QSK_TEST_SUPPORT_DIRS}
 
 QMAKE_RPATHDIR *= $${QSK_LIB_DIR}
 qskAddLibrary( $${QSK_LIB_DIR}, qsktestsupport)
+
+qskAddLibrary( $${QSK_PLUGIN_DIR}/skins, squiekskin)
+qskAddLibrary( $${QSK_PLUGIN_DIR}/skins, materialskin)

support/support.pro

@@ -51,3 +51,6 @@ fontconfig {
 
     DEFINES += FONTCONFIG_FILE=$$clean_path( $$QSK_FONTCONF_FILE )
 }
+
+target.path    = $${QSK_INSTALL_LIBS}
+INSTALLS       = target