[Buildroot] [PATCH/next] package/uhd: fix python module detection

[Gwenhael Goavec-Merou]

From: Gwenhael Goavec-Merou <gwenhael.goavec-merou at trabucayre.com>

$(HOST_DIR)/bin/python symlink is only created when BR2_PACKAGE_PYTHON3 is
set.
When only host-python3 is used this symlink is not present and build fails
with:
-- Python checking for Python version 2.7 or greater
-- Python checking for Python version 2.7 or greater - unknown error
-- 
-- Python checking for Mako templates 0.4.2 or greater
-- Python checking for Mako templates 0.4.2 or greater - unknown error
-- 
-- Python checking for requests 2.0 or greater
-- Python checking for requests 2.0 or greater - unknown error
-- 
-- Python checking for numpy 1.7 or greater
-- Python checking for numpy 1.7 or greater - unknown error
-- 
-- Configuring LibUHD support...
--   Dependency Boost_FOUND = TRUE
--   Dependency HAVE_PYTHON_PLAT_MIN_VERSION = FALSE
--   Dependency HAVE_PYTHON_MODULE_MAKO = FALSE

This patch set explicitly PYTHON_EXECUTABLE to $(HOST_DIR)/bin/python3

fixes:
- http://autobuild.buildroot.net/results/35c0b9597c75dade241a3b3786fae30551c48008
- http://autobuild.buildroot.net/results/89069102bf8785ce8a9ec3b4c6fa32749c2e3586

Signed-off-by: Gwenhael Goavec-Merou <gwenhael.goavec-merou at trabucayre.com>
---
 package/uhd/uhd.mk | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package/uhd/uhd.mk b/package/uhd/uhd.mk
index 5da1697925..e8f197f9dd 100644
--- a/package/uhd/uhd.mk
+++ b/package/uhd/uhd.mk
@@ -19,7 +19,7 @@ UHD_DEPENDENCIES = \
 	host-python-mako
 
 UHD_CONF_OPTS = \
-	-DPYTHON_EXECUTABLE=$(HOST_DIR)/bin/python \
+	-DPYTHON_EXECUTABLE=$(HOST_DIR)/bin/python3 \
 	-DRUNTIME_PYTHON_EXECUTABLE=/usr/bin/python \
 	-DENABLE_C_API=ON \
 	-DENABLE_DOXYGEN=OFF \
-- 
2.30.2