arch, linux, package: remove whitespaces

Whitespaces were searched using the following regex:

[ ]{1,}\t

and then manually removed in most of the cases. For
xserver_xorg-server.mk, tabs before backslashes were removed.

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/python3/python3.mk

@@ -24,9 +24,9 @@ PYTHON3_LIBTOOL_PATCH = NO
 # installed in $(HOST_DIR), as it is needed when cross-compiling
 # third-party Python modules.
 
-HOST_PYTHON3_CONF_OPTS += 	\
+HOST_PYTHON3_CONF_OPTS +=	\
 	--without-ensurepip	\
-	--without-cxx-main 	\
+	--without-cxx-main	\
 	--disable-sqlite3	\
 	--disable-tk		\
 	--with-expat=system	\
@@ -152,7 +152,7 @@ endif
 
 PYTHON3_CONF_OPTS += \
 	--without-ensurepip	\
-	--without-cxx-main 	\
+	--without-cxx-main	\
 	--with-system-ffi	\
 	--disable-pydoc		\
 	--disable-test-modules	\