Skip gdb.python/py-thrhandle.exp if python is not enabled.

gdb/testsuite:

2017-11-03  Yao Qi  <yao.qi@linaro.org>

	* gdb.python/py-thrhandle.exp: Skip it if python is not
	enabled.

gdb/testsuite/ChangeLog

@@ -1,3 +1,8 @@
+2017-11-03  Yao Qi  <yao.qi@linaro.org>
+
+	* gdb.python/py-thrhandle.exp: Skip it if python is not
+	enabled.
+
 2017-10-31  Simon Marchi  <simon.marchi@polymtl.ca>
 
 	* gdb.mi/mi-break.exp (test_breakpoint_commands): Test backtrace

gdb/testsuite/gdb.python/py-thrhandle.exp

@@ -27,6 +27,10 @@ if {[gdb_compile_pthreads "${srcdir}/${subdir}/${srcfile}" "${binfile}" executab
 }
 
 clean_restart ${binfile}
+
+# Skip all tests if Python scripting is not enabled.
+if { [skip_python_tests] } { continue }
+
 runto_main
 
 gdb_test "break after_mc_barrier" \