[OE-core] [PATCH] waf.bbclass: correct the searching patch of waf

[Yue Tao]

The waf is localed at ${S}/buildtools/bin/, not ${S}. Update the
subsrcdir to look for the right path. The WARNINGs below can be fixed
by the fix.

WARNING: lib32-libtalloc-2.1.9-r0 do_configure: Unable to execute waf --version, exit code 127. Assuming waf version without bindir/libdir support.
WARNING: lib32-libtdb-1.3.14-r0 do_configure: Unable to execute waf --version, exit code 127. Assuming waf version without bindir/libdir support.
WARNING: lib32-libtevent-0.9.31-r0 do_configure: Unable to execute waf --version, exit code 127. Assuming waf version without bindir/libdir support.
WARNING: lib32-libldb-1.1.29-r0 do_configure: Unable to execute waf --version, exit code 127. Assuming waf version without bindir/libdir support.
WARNING: lib32-samba-4.6.7-r0 do_configure: Unable to execute waf --version, exit code 127. Assuming waf version without bindir/libdir support.

Signed-off-by: Yue Tao <Yue.Tao at windriver.com>
---
 meta/classes/waf.bbclass | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/meta/classes/waf.bbclass b/meta/classes/waf.bbclass
index 19e93761b3..f8e66835fb 100644
--- a/meta/classes/waf.bbclass
+++ b/meta/classes/waf.bbclass
@@ -7,7 +7,7 @@ python waf_preconfigure() {
     import subprocess
     from distutils.version import StrictVersion
     subsrcdir = d.getVar('S')
-    wafbin = os.path.join(subsrcdir, 'waf')
+    wafbin = os.path.join(subsrcdir + '/buildtools/bin/', 'waf')
     try:
         result = subprocess.check_output([wafbin, '--version'], cwd=subsrcdir, stderr=subprocess.STDOUT)
         version = result.decode('utf-8').split()[1]
-- 
2.17.0