test-* recipes: fix xmllint errors

config_0.xml.tmp:26: element config: Schemas validity error :
  Element 'config': Character content other than whitespace is
  not allowed because the content type is 'element-only'

Issue #3612

repos/gems/recipes/pkg/test-libc_vfs_audit/runtime

@@ -41,8 +41,8 @@
 		<start name="test-libc_vfs">
 			<resource name="RAM" quantum="4M"/>
 			<config>
-				<iterations value="1"/>}
-				<write-read size="1M" buffer_size="8K"/>}
+				<iterations value="1"/>
+				<write-read size="1M" buffer_size="8K"/>
 				<vfs>
 					<dir name="tmp"> <fs/> </dir>
 					<dir name="dev"> <log/> </dir>

repos/libports/recipes/pkg/test-libc_vfs_fs/runtime

@@ -37,7 +37,7 @@
 		<start name="test-libc_vfs">
 			<resource name="RAM" quantum="4M"/>
 			<config>
-				<iterations value="1"/>}
+				<iterations value="1"/>
 				<write-read size="1M" buffer_size="8K"/>
 				<vfs>
 					<dir name="tmp"> <fs/> </dir>

repos/libports/recipes/pkg/test-libc_vfs_ram/runtime

@@ -27,7 +27,7 @@
 				<any-service> <parent/> </any-service>
 			</route>
 			<config>
-				<iterations value="1"/>}
+				<iterations value="1"/>
 				<write-read size="1M" buffer_size="8K"/>
 				<vfs>
 					<dir name="tmp"> <ram/> </dir>