package/pkg-python: fix pep517 data files installation

When installing a wheel in pep517 compatibility mode, the pyinstaller.py is
invoked with the --data parameter which point to the directory in which data
files should be installed.
Actually the --data parameter points to the /usr subdirectory which is indeed
wrong cause it shall point to the root directory where the wheel will be
installed.
This fixes the problem of having configuration files installed in /usr/etc
instead of /etc.

Signed-off-by: Angelo Compagnucci <angelo.compagnucci@gmail.com>
Tested-by: Fiona Klute <fiona.klute+wiwa@gmx.de>
Signed-off-by: Arnout Vandecappelle <arnout@mind.be>

package/pkg-python.mk

@@ -67,7 +67,7 @@ PKG_PYTHON_PEP517_INSTALL_TARGET_CMD = \
 	--purelib=$(TARGET_DIR)/usr/lib/python$(PYTHON3_VERSION_MAJOR)/site-packages \
 	--headers=$(TARGET_DIR)/usr/include/python$(PYTHON3_VERSION_MAJOR) \
 	--scripts=$(TARGET_DIR)/usr/bin \
-	--data=$(TARGET_DIR)/usr
+	--data=$(TARGET_DIR)
 
 PKG_PYTHON_PEP517_INSTALL_STAGING_CMD = \
 	$(TOPDIR)/support/scripts/pyinstaller.py \
@@ -76,7 +76,7 @@ PKG_PYTHON_PEP517_INSTALL_STAGING_CMD = \
 	--purelib=$(STAGING_DIR)/usr/lib/python$(PYTHON3_VERSION_MAJOR)/site-packages \
 	--headers=$(STAGING_DIR)/usr/include/python$(PYTHON3_VERSION_MAJOR) \
 	--scripts=$(STAGING_DIR)/usr/bin \
-	--data=$(STAGING_DIR)/usr
+	--data=$(STAGING_DIR)
 
 PKG_PYTHON_PEP517_DEPENDENCIES = \
 	host-python-pypa-build \