[vala] posix: Add execlp method

[Evan Nemerson <evann src gnome org>]

commit 0ce45f0049316042bab8d5de47a486ae92737299
Author: Lionel Landwerlin <llandwerlin gmail com>
Date:   Sat Jul 17 14:53:31 2010 -0700

    posix: Add execlp method
    
    Fixes bug 623600.

 vapi/posix.vapi |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/vapi/posix.vapi b/vapi/posix.vapi
index cae1d3f..b0d1f98 100644
--- a/vapi/posix.vapi
+++ b/vapi/posix.vapi
@@ -1515,6 +1515,8 @@ namespace Posix {
 	[CCode (cheader_filename = "unistd.h")]
 	public int execl (string path, params string[] arg);
 	[CCode (cheader_filename = "unistd.h")]
+	public int execlp (string path, params string[] arg);
+	[CCode (cheader_filename = "unistd.h")]
 	public int pipe ([CCode (array_length = false, null_terminated = false)] int[] pipefd);
 	[CCode (cheader_filename = "unistd.h")]
 	public ssize_t read (int fd, void* buf, size_t count);