bitbake: bitbake: use sys.exit to simplify the code

Used sys.exit instead of assigning exit code to
variable. This way it's more clear when bitbake
exists and which exit code is used.

(Bitbake rev: 5ecb8817bd49223652ede4fe513f1a42f2196798)

Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/bin/bitbake

@@ -41,16 +41,13 @@ if __name__ == "__main__":
     if __version__ != bb.__version__:
         sys.exit("Bitbake core version and program version mismatch!")
     try:
-        ret = bitbake_main(BitBakeConfigParameters(sys.argv),
-                           cookerdata.CookerConfiguration())
+        sys.exit(bitbake_main(BitBakeConfigParameters(sys.argv),
+                              cookerdata.CookerConfiguration()))
     except BBMainException as err:
-        print >>sys.stderr, err
-        ret = 1
+        sys.exit(err)
     except bb.BBHandledException:
-        ret = 1
+        sys.exit(1)
     except Exception:
-        ret = 1
         import traceback
         traceback.print_exc()
-    sys.exit(ret)
-
+        sys.exit(1)