Adapt Alire stub in test

Author: eliericha

testsuite/ada_lsp/project_config.alire/.alr_build

@@ -0,0 +1 @@
+Dummy output of `alr build` command

testsuite/ada_lsp/project_config.alire/alr

@@ -1,7 +1,10 @@
-#!/bin/sh
+#!/bin/bash
 set -e
 # A dummy Alire replacement for testing purposes
-while [ $# -gt 1 ] ; do shift ; done
+
+# Skip parameters starting with '-' until the Alire action is reached
+while [ $# -gt 1 ] && [[ $1 == -* ]] ; do shift ; done
+
 DIR=`cd $(dirname $0); pwd`
 GNAT=$(dirname `which gnat`)
 sed -e "s#\${DIR}#${DIR}#g" -e "s#\${GNAT}#${GNAT}#g" ${DIR}/.alr_$1