[PATCH] buildrun: no sanitize $PATH for kbuild invocation

[faicker.mo]

From: "faicker.mo" <faicker.mo@ucloud.cn>

For newer kernel, SCL with newer gcc and systemtap prepends
it's directory to the $PATH to take effect.  It doesn't work
if $PATH is sanitized (prefixed with /usr/bin:/bin:)

Fixes e8474d2a

Signed-off-by: faicker.mo <faicker.mo@ucloud.cn>
---
 buildrun.cxx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/buildrun.cxx b/buildrun.cxx
index cef14ad..dcdb6e8 100644
--- a/buildrun.cxx
+++ b/buildrun.cxx
@@ -99,7 +99,7 @@ make_any_make_cmd(systemtap_session& s, const string& dir, const string& target)
   const char *oldpath = getenv("PATH");
   if (oldpath != NULL)
     {
-      newpath += ':';
+      newpath = "PATH=";
       newpath += oldpath;
     }
 
-- 
1.8.3.1