freertos-variscite: Fix compile failure when do_compile is rerun

do_compile could be rerun on a previous built tree, the do_compile of
this recipe however is doing renaming and moving of files and then
assuming the pristine condition is hard because it would have run
these operations in prior run, in second run it does not find the
${S}/boards/${CM_BOARD}/demo_apps/disable_cache/ dir and find cmd fails
to execute

| find: ‘/mnt/b/yoe/master/build/tmp/work/imx8qm_var_som-yoe-linux/freertos-variscite/2.9.x-r0/git/boards/som_mx8qm/demo_apps/disable_cache/hello_world’: No such file or directory
| WARNING: /mnt/b/yoe/master/build/tmp/work/imx8qm_var_som-yoe-linux/freertos-variscite/2.9.x-r0/temp/run.do_compile.406532:151 exit 1 from 'find /mnt/b/yoe/master/build/tmp/work/imx8qm_var_
som-yoe-linux/freertos-variscite/2.9.x-r0/git/boards/som_mx8qm/demo_apps/disable_cache/ -name '*hello_world*' -exec sh -c 'mv "$1" "$(echo "$1" | sed s/hello_world/disable_cache/)"' _ {} \;'

Signed-off-by: Khem Raj <[email protected]>

recipes-bsp/freertos-variscite/freertos-variscite.inc

@@ -103,7 +103,9 @@ do_compile() {
         # Rename hello_world strings to disable_cache
         grep -rl hello_world ${S}/boards/${CM_BOARD}/demo_apps/disable_cache | xargs sed -i 's/hello_world/disable_cache/g'
         # Rename hello_world files to disable_cache
-        find ${S}/boards/${CM_BOARD}/demo_apps/disable_cache/ -name '*hello_world*' -exec sh -c 'mv "$1" "$(echo "$1" | sed s/hello_world/disable_cache/)"' _ {} \;
+        if [ -e ${S}/boards/${CM_BOARD}/demo_apps/disable_cache ]; then
+            find ${S}/boards/${CM_BOARD}/demo_apps/disable_cache/ -name '*hello_world*' -exec sh -c 'mv "$1" "$(echo "$1" | sed s/hello_world/disable_cache/)"' _ {} \;
+        fi
     fi
 
     # Build all demos in CM_DEMOS