Use custom variable for test folder path in win32 fragments

Tycho lacked support for resolving locations of linked resources whose
path contained custom variables. For that reason, the linked folder path
to the tests folder of the win32 fragments contain a repetition of an
already existing custom variable to the host bundle. Since according
Tycho support has been added recently , this change replaces the inlined
custom variable with the actual custom variable.

Author: HeikoKlare

binaries/org.eclipse.swt.win32.win32.aarch64/.project

@@ -110,8 +110,7 @@
 		<link>
 			<name>Eclipse SWT Tests</name>
 			<type>2</type>
-			<!-- Once Tycho supports custom variables, SWT_HOST_PLUGIN should be used here: https://github.com/eclipse-tycho/tycho/issues/3820 -->
-			<locationURI>PARENT-2-PROJECT_LOC/bundles/org.eclipse.swt/Eclipse%20SWT%20Tests</locationURI>
+			<locationURI>SWT_HOST_PLUGIN/Eclipse%20SWT%20Tests</locationURI>
 		</link>
 	</linkedResources>
 	<variableList>

binaries/org.eclipse.swt.win32.win32.x86_64/.project

@@ -110,8 +110,7 @@
 		<link>
 			<name>Eclipse SWT Tests</name>
 			<type>2</type>
-			<!-- Once Tycho supports custom variables, SWT_HOST_PLUGIN should be used here: https://github.com/eclipse-tycho/tycho/issues/3820 -->
-			<locationURI>PARENT-2-PROJECT_LOC/bundles/org.eclipse.swt/Eclipse%20SWT%20Tests</locationURI>
+			<locationURI>SWT_HOST_PLUGIN/Eclipse%20SWT%20Tests</locationURI>
 		</link>
 	</linkedResources>
 	<variableList>