fail cmake build on shader compilation failure

Scripts/CompileShaders.sh

@@ -7,12 +7,11 @@ check_return_code() {
   # return code of last executed command  
   retVal=$?
   if [ $retVal -ne 0 ]; then
-    read -p "Press enter to continue"
     exit 1
   fi
 }
 
-rm *.spv
+rm -f *.spv
 
 for f in $SHADER_PATH/*.vert ; do
   filename=$(basename -- "$f")
@@ -34,6 +33,3 @@ for f in $SHADER_PATH/*.vert ; do
   sed -i "s/} TFileTableEntry;/} TFileTableEntry;\n#endif \/*TFileTableEntry_H_INCLUDED*\//" $GENERATED_DATA_PATH/$filename_no_ext.h
   rm *.spv
 done
-
-read -p "Press enter to continue"
-