Apply clang-format for more source files (#795)

Apply clang-format for C source files in folder core/app-mgr,
core/app-framework, and test-tools.
And rename folder component_test to component-test, update
zephyr build document.

Signed-off-by: Wenyong Huang <wenyong.huang@intel.com>

core/app-framework/app-native-shared/native_interface.h

@@ -10,6 +10,4 @@
          implemented by both [app] and [native] worlds */
 #include "bh_platform.h"
 
-
 #endif /* end of _NATIVE_INTERFACE_H */
-