Mark standalone linux launchers as not having appstream data

The X-AppStream-Ignore=true will signal to appstream generators that
these programs won't have their own appstream information, since we
provide these programs under the main KiCad appstream file.

resources/linux/launchers/org.kicad.bitmap2component.desktop.in

@@ -9,3 +9,4 @@ Name=KiCad Image Converter
 GenericName=Bitmap to Component Converter
 Comment=Create a component from a bitmap for use with KiCad
 Keywords=bitmap2component
+X-AppStream-Ignore=true

resources/linux/launchers/org.kicad.eeschema.desktop.in

@@ -10,3 +10,4 @@ Name=KiCad Schematic Editor (Standalone)
 GenericName=Schematic Capture Tool
 Comment=Standalone schematic editor for KiCad schematics
 Keywords=eeschema
+X-AppStream-Ignore=true

resources/linux/launchers/org.kicad.gerbview.desktop.in

@@ -10,3 +10,4 @@ Name=KiCad Gerber Viewer
 GenericName=Gerber File Viewer
 Comment=View Gerber files
 Keywords=gerbview
+X-AppStream-Ignore=true

resources/linux/launchers/org.kicad.pcbcalculator.desktop.in

@@ -8,3 +8,4 @@ Exec=pcb_calculator
 Name=KiCad PCB Calculator
 GenericName=PCB Calculator
 Comment=Calculator for various electronics-related computations
+X-AppStream-Ignore=true

resources/linux/launchers/org.kicad.pcbnew.desktop.in

@@ -10,3 +10,4 @@ Name=KiCad PCB Editor (Standalone)
 GenericName=PCB layout editor
 Comment=Standalone circuit board editor for KiCad boards
 Keywords=pcbnew
+X-AppStream-Ignore=true