Only build svg2qvg when not cross-compiling

Ideally we should use "option(host_build)", but that seems
complicated. In addition, some toolchains don't include libQt5Svg.so,
so we cannot build the tool then anyhow.

examples/automotive/automotive.pro

@@ -59,8 +59,13 @@ SVGSOURCES = \
 # writing application project files.
 ###########
 
-# Convert path to shell path, otherwise it fails on Windows.
-SVG2QVG=$$shell_path($${QSK_OUT_ROOT}/tools/bin/svg2qvg)
+cross_compile {
+    # for now just assume that a desktop version of the tool is in the path
+    SVG2QVG=svg2qvg
+} else {
+    # Convert path to shell path, otherwise it fails on Windows.
+    SVG2QVG=$$shell_path($${QSK_OUT_ROOT}/tools/bin/svg2qvg)
+}
 
 svg2qvg.name = SVG compiler
 svg2qvg.input = SVGSOURCES

examples/qvgviewer/qvgviewer.pro

@@ -16,8 +16,13 @@ SVGSOURCES = \
     svg/01.08.05q.svg \
     svg/01.25.18.svg
 
-# Convert path to shell path, otherwise it fails on Windows.
-SVG2QVG=$$shell_path($${QSK_OUT_ROOT}/tools/bin/svg2qvg)
+cross_compile {
+    # for now just assume that a desktop version of the tool is in the path
+    SVG2QVG=svg2qvg
+} else {
+    # Convert path to shell path, otherwise it fails on Windows.
+    SVG2QVG=$$shell_path($${QSK_OUT_ROOT}/tools/bin/svg2qvg)
+}
 
 svg2qvg.name = SVG compiler
 svg2qvg.input = SVGSOURCES

tools/tools.pro

@@ -1,6 +1,6 @@
 TEMPLATE = subdirs
 
-qtHaveModule(svg) {
+qtHaveModule(svg):!cross_compile {
 
     SUBDIRS += \
         svg2qvg